The Silent Forest: Impact of Bird Hunting by Prehistoric Polynesians on the Decline and Disappearance of Native Avifauna in Hawai’i

: This research focuses on the historical demise of Hawaiian avifauna due to hunting by ancient Polynesians. Numerous documents, published since the early 1800s, were scrutinized and evaluated; these provided information on bird hunting and traditional Hawaiian practices. Hawaiians used birds as sources of feathers and food. Feathers were important symbols of power for Polynesians; in Hawai’i, feathers were more highly prized than other types of property. Feathers used for crafts were obtained from at least 24 bird species, however, the golden feathers of ‘¯o‘¯o and mamo birds made them primary targets for birdhunters; both birds became extinct by the late 1800s. Feathers were utilized for many items, including ‘ahu‘ula [cloaks], mahiole [war helmets], and k¯ahili [standards]. Most garments utilized a considerable number of feathers; a cloak for Kamehameha consumed the golden feathers of 80,000 mamo birds. Bird meat was an important food item for native Hawaiians. It is believed that most birds were killed after being plucked; historical sources mention ~30 bird species were consumed. The ‘ua‘u ( Pterodroma sandwichensis ), a currently endangered seabird, was ruthlessly hunted and avidly eaten. Its current geographical range is just a minute fraction of its former one; now, ‘ua‘us are largely restricted to inaccessible cliffs at Haleakal¯a Crater (Maui).

'One may spend hours in [Hawaiian forests] and not hear the notes of a single native bird. Yet a few years ago the same areas were abundantly supplied with native birds, and the notes of the oo, amakihi, iiwi, akakani, omao, elepaio and others might have been heard on all sides . . . So far as human eye can see, their old home offers to the birds practically all that it used to, but the birds themselves are no longer there.' Henry W. Henshaw, 1902 [1], p. 10.

Introduction: Bird Extinctions in the Hawaiian Islands
As a mountain ecologist and biogeographer, I have been hiking through the montane forests and high-elevation ecosystems of the four largest Hawaiian Islands for almost 30 years. In most places, I regrettably encountered a noticeable scarcity, or even absence, of endemic birds. They simply are not to be seen, and not to be heard; they do not appear to be there anymore.
Polynesian settlers seemed to greatly appreciate the rich diversity of forest birds, which were often portrayed as powerful and wise beings-e.g., 'The Battle of the Owls' [2], p. 188. The overwhelming feeling of wonder of ancient Hawaiians is evident in the traditional mo'olelo [myth] 'How birds became visible', frequently told in different versions [3,4], [5], p. 33, [6], p. 74: it is said that, long ago, birds were invisible; people could hear-but could not see-them; only the demi-god Māui could. A visitor came to Maui from another island, and conceitedly boasted of his island, its beautiful mountains, waterfalls, and forests. Māui thought on how to outclass him with something unusual his own island had, and secretly called the forest birds and ordered them to perch on the trees and bushes around them, where they filled the air with song. The boastful visitor was greatly surprised by this striking, magic music, and Māui, at last, using his mighty power caused the little feathered friends to become visible. Ever since that day, birds may be seen as well as heard.
However, these enchanting birds ultimately paid a steep price for their splendor, as Westervelt [3], ch.ix, finished his version of the story as follows: 'The beautiful red birds, iiwi and akakani, and the birds of glorious yellow feathers, the oo and the mamo, were a joy to both eye and ear and found high places in Hawaiian legend and story, and all gave their most beautiful feathers for the cloaks and helmets of the chiefs.' Thus, in a perverse and sad reversal of affairs, Hawaiian forest birds have now become invisible again, and their mysterious music is once more silent, but now they cannot be conjured up to magically reappear. In the words of Scott et al. [7], p. 1: 'The dawn song chorus of this ghost avifauna will never again be heard, but one can dream. ' The Hawaiian Islands have the dubious distinction of leading the world in numbers of historically extinct and currently endangered bird species [8], p. 15; sadly, this unfortunate situation is not a recent phenomenon. Bird extinctions after European discovery were extensive and are now well documented; however, native Polynesians caused extinctions of an even greater magnitude [9][10][11][12][13][14][15][16]. Fossil evidence shows at least 50% of the original avifauna became extinct after Polynesians arrived in Hawai'i around 400 A.D. Initially, 109 endemic species occurred in the Hawaiian Islands, 35 of which (32%) still survived in 2001; 19 additional taxa (17.5%) were extant in the 18th century, whereas 55 (50.5%) are known only from the fossil and subfossil record. As of 2001, 75% of historically known native birds were extinct or endangered [7,[17][18][19]; recent estimates suggest that 77 Hawaiian bird species have vanished during the last~700 years [20,21] and the surviving species have declined dramatically, and are rarely seen [22].
In pre-human Hawai'i, the large land area and extensive coastlines, coupled with a relative absence of predators, provided ample habitat for a spectacular assemblage of seabirds; millions of petrels, albatrosses, shear-waters, terns, and other seabirds populated the islands. These birds were the first to be easily decimated or exterminated by island settlers [13]. After the unwary, flightless, ground-and burrow-nesting seabirds were eliminated, Polynesians devised an astounding variety of techniques for catching forest birds [6,13,[23][24][25][26][27][28][29]; these bird-hunting practices eventually wreacked havoc also among forest bird populations.
The severe past depredations of avifauna appear to have had a lasting negative effect on the Hawaiian forest birds and, as a result, the alarming trend of declining bird populations still continues. Overall, the USA has suffered the most recently recorded bird extinctions (25) on Earth, 84% of which have taken place in Hawai'i [30]. As of 1981, 25 of the 46 historically known species of Hawaiian forest birds remained; in 2009, only 24 still survived, and by 2016, this number had dropped to 23; of these, 13 (56.5%) were listed as either threatened or endangered. What is most alarming, some species (e.g., Hawaiian crow) are extinct in the wild and have fewer than 115 individuals surviving in captivity; others (e.g., Maui parrotbill, Pseudonestor xanthophrys, and O'ahu 'elepaio, Chasiempis ibidis) may include extremely low populations (~500-1000) of remaining birds [21], p. 203, [31,32].
The specific causes of these extinctions have long been a subject of inquiry by ecologists; at one time or another, practically every possible agent has been proposed for the demise of Hawaiian avifauna, but conclusive evidence has seldom been provided [13]. In fact, no individual factor can be singled out for either the extinction of some species or the great reduction in numbers of others; instead, a series of interconnected causes contributed to the relentless demise of Hawaiian avifauna. There is, however, widespread agreement that most of the blame should be ascribed to anthropogenic factors [7,9,10,13,17,18,21,22,31,[33][34][35][36][37][38][39]. Human-associated factors typically include: 1, modification of the natural habitat and destruction of original vegetation after initial settlement by Polynesians, followed by agricultural expansion; 2, bird catching by native Hawaiians (see below); 3, predation by animals introduced by settlers, such as Polynesian rats (Rattus exulans), pigs, chickens, dogs, and, later, mongoose and feral house cats; 4, imported avian parasites/diseases, such as avian malaria and pox; 5, avian competition with introduced birds; 6, shooting and trapping of rare species by collectors, largely in the 1880s-1920s; 7, a host of abiotic factors that include hurricanes, tsunamis, fires, floods, volcanic eruptions, and various recurrent environmental perturbations.
In comparison with the other human-related causes, few researchers have focused on the role of bird catching and hunting [12,28,29,[40][41][42][43]. Gomes [28,29] has recently provided the most valuable contributions in this area. Although it is known that Hawaiians hunted birds for feathers, food, and for tools, most references normally allude obliquely to the use of feathers in ancient Hawai'i, and only mention, in passing, that bird plumage was utilized for 'making capes and cloaks'; detailed information about birds as a source of meat is even more scanty, and the subject usually is carefully avoided by most authors. The specific goal of this study is to document, assess, and discuss much of the available information on birdhunting for feathers and food, widely scattered over a myriad of publications over the past two centuries. A detailed case study on an endangered Hawaiian bird, the dark-rumped petrel (Pterodroma sandwichensis), is also included.

Materials and Methods: Relevant Historical Sources, and Use of the Hawaiian Language
The documents assessed here cover three consecutive historical periods: first, I discuss those written by native Hawaiian chroniclers and historians in the mid-19th century; then, come a spate of scientific publications by western scientists and ornithologists that visited Hawai'i during the late 19th and early 20th centuries; later, a selected group of studies published during the 20th and 21st centuries.
A  [48]; I'i 's work is a peculiar narrative, exclusively focused on his own personal experiences. For additional details on these Hawaiian scholars, see [49].
Numerous research publications of the 1890s and early 1900s provide valuable accounts of Hawaiian avifauna and featherwork during a critical period of rapid bird disappearance. Among these, it is worth consulting the following: Emerson (1895), 'The bird-hunters of ancient Hawaii' [23]; Brigham (1899), 'Hawaiian feather work' [25]; Henshaw (1902), 'Birds of the Hawaiian Islands' [1]; Perkins (1903), 'Vertebrata, in Fauna Hawaiiensis or the Zoology of the Sandwich (Hawaiian) Islands' [26]; and Bryan (1908), 'Some birds of Molokai' [27]. Two books, 'Aves Hawaiienses: The Birds of the Sandwich Islands' (1890-1899) [50] by Wilson and Evans, and 'The Avifauna of Laysan and the Neighbouring Islands' (1893-1900) [51] by Rothschild, provide particularly striking illustrations of rare and extinct Hawaiian birds. For many early references, I chose to provide citations with the original author's words, which provide unambiguous impressions of the original situations they experienced [21], p. x. Many historical references have now been reprinted, and/or their pdf and HTML files can be readily found on the web.
Literally, scores of relevant references were published afterwards. Among these, 'Vikings of the Sunrise' (1959) [52], a charming book written in 1938 by Te Rangi Hīroa (Sir Peter H. Buck)-Director of the Bishop Museum in O'ahu from 1936 to 1951-assesses early Polynesian and Hawaiian settlement. Munro (1960), 'Birds of Hawai'i' [33]-published in 1944-discusses what was known of Hawaiian avifauna by the mid-20th century. Berger (1972), 'Hawaiian Birdlife' [31] is an early, thorough survey of Hawaiian birds. Rose et al. (1993) [53] provides details about feather uses. Walther and Hume (2016) [21] offers a succint summary of the extinction of Hawaiian avifauna. Two multiauthored volumes [7,54] deal with numerous aspects of the evolution, ecology, and conservation of Hawaiian birds. The many thorough publications by Pukui are simply invaluable, however, 'Place Names of Hawaii' (1974) [55] and 'Hawaiian Dictionary' (1986) [56] are extremely useful. Handy and Pukui (1958), 'The Polynesian Family System in Ka-'u, Hawaii' [57], and Handy and Handy (1972), 'Native Planters in Old Hawaii' [58] provide excellent accounts of traditional life in Hawai'i. References include the year of the consulted publication in parentheses ( ), and the year of the original appearance, if different, in brackets [ ].
Hawaiian grammar usage follows Elbert and Pukui (2001) [59]. Spelling and punctuation of Hawaiian names and geographic features conform to Pukui et al. (1974) [55], or Pukui and Elbert (1986) [56]; words include diacritical marks as the kahakō [aka macron]a bar placed above vowels that are long and stressed-and the 'u'ina [snap] or 'okina [break]-a reversed apostrophe for glottal stops or guttural breaks. Hawaiian words, but not Hawaiian place names are, as a rule, italicized; the English meaning of most Hawaiian words is shown in square brackets [ ].

Results
"That the bird with tail alert may come to our snare; may alight on our deftly moving pole, limed with gum of bread-fruit, akokoko, mamane. Good luck attend our house." 'Ōlelo Haole: E ku hoohei ia ka manu. [Hawaiian Proverb: 'That the bird is swept off']' Noah Gomes, 2015 [28], p. 73.

The Birdcatcher's Trade
Traditional bird hunting in Hawai'i was commonly referred to as kāpili manu; birds were mainly captured by professional kia manu [birdcatchers] serving for, or licensed by, king Kamehameha or local ali'i [chiefs] [28]. This was a hard profession, demanding hunters to live in the forests and mountains for long, solitary periods; the ancient mō'ī [kings] are said to have brought warriors to the mountains to do the job, however, this was not an easy task, and a horde of men working in close proximity was not very successful in the venture [23].
Bird hunting, like many upland activities, was temporarily suspended during ho'oilo [rainy season], from November to March [57]. However, as tropical birds breed and molt continuously throughout the year [60], birds explicitly caught for their feathers were captured at the beginning of the molting season, when feathers might be loose and more easily removed from them [61]; some birds-e.g., nēnē (Branta sandvicensis)were unable to fly at this time and could not easily escape the hunters [33], p. 42. Birds generally move from the lowlands to the highlands in coordination with seasonal plant flowering; as many birds, particularly honeycreepers, are attracted to the sweet nectar of trees such as māmane (Sophora chrysophylla) and 'ōhi'a (Metrosideros polymorpha) [62,63], their two flowering periods (March-May and August-October) were also associated with the vertical migration of birds and the seasonal movements of birdcatchers following them [23], p. 103. Thus, the 'apapane (Himatione sanguinea), 'amakihi (Hemignathus virens), 'i'iwi (Vestiaria coccinea) and other upland honeycreepers only descend makai [seaward] along the dry leeward flanks of Haleakalā (Maui) when these trees are flowering [64], p. 6.
The birdcatcher would usually offer a prayer before starting, and an offering to the gods would also be performed [28]; some hunters released the first captured bird, unplucked and unharmed. Birdcatchers were often accompanied by their wives, who could aid in plucking and organizing feathers, or in manufacturing kapa [cloth] with the fine fibers of mamake (Pipturus albidus) shrubs [62]. Hunters favored different dressing styles, but commonly used a long, hooded cloak that covered the body from knees to head. This clothing was made with a meshed network of dried ki (ti, Cordyline fruticosa) [62,65] leaves, with their tips hanging down, woven into a dense lattice of olonā (Touchardia latifolia) bark fibers [56]; this attire was very effective in shedding water, and served the double purpose of protecting the hunter from tropical downpours and shielding the delicate bird feathers [23], p. 110. High-altitude birdcatchers used kapa lau'i [special kapa outfits] also made with ki leaves, plaited like mats, which made very warm clothing; hunters of 'ua'u birds, often working at up to~3000 m elevation, greatly favored them [66], p. 95. As Kamakau [46], p. 108, explained: 'These thatched ti-leaf garments were worn in the icy mountains because the rain and cold did not penetrate them'.
Birdcatchers showed great ingenuity in devising methods for capturing birds; these varied considerably among island districts, seasons, and individual hunters ( Table 1). The most common methods are mentioned by Malo [24], p. 61; briefly, these included the use of kēpau [bird-lime] made from the sticky sap of various plants, including mamane, 'akoko (Euphorbia lorifolia), or ulu (breadfruit, Arctocarpus altilis) [65]; the pahele [snare], baited with flowers or fruits; poles, lines, and nets. Some birds were caught by hand, often in their nest hole, captured after concealment under a built covert-such as that provided by fern fronds or 'ie'ie (Freycinetia arborea) leaves [65]-by clubbing them, or running them down; birds might also be skewered in their burrows with barbed sticks, or pelted with stones. It was a regular practice to keep certain forest birds alive in special cages, such as 'ō'ō (Moho nobilis), 'i'iwi (Vestiaria coccinea), or 'apapane (Himatione sanguinea), to be used as maunu [decoys] [23], p. 107, [28], p. 140. Townsend (1839) [67], p. 207, explained a 'singular mode of catching the honey sucking birds,' including the mamo (Drepanis pacifica) in 1835: young boys on Kaua'i would lay down on the ground, cover themselves with bushes, and hold one of the campanulate flowers favored by the bird between finger and thumb. As a honeyeating bird dipped its long, curved bill into the flower, the boy would close his fingers into the flower and seize the bird by its tiny bill; dozens of birds were taken this way [33], p. 92, [50], p. xiv.
[f] In addition to the native birds above, the iridescent black tail feathers of the domestic chicken, moa (Gallus gallus), and the domestic peafowl (Pavo cristatus), were often used in kāhili-making [33], p. 50, [53], p. 293, [61]. As some bird species mentioned in historical records cannot be unequivocally identified in modern taxonomy, the question marks (?) are an honest appraisal of the birds' extinction status.
A practice that contributed to significantly exarcebating hunting pressure on birds is that feathers were commonly demanded as tax by mō'ī and ali'i [1], [37], p. 318. The yellow feathers of the 'ō'ō and mamo were especially valued, and, as they were difficult to procure, were traded at times among the maka'āinana [common people] themselves, often at steep prices [28], p. 121. Malo [24], pp. 107,190, mentioned that lands that produced feathers were heavily taxed, especially at the annual Makahiki time, and feathers of the 'ō'ō, mamo, and i'iwi were the most acceptable offering to the Makahiki-idol; Kame'eleihiwa [69] provides details of the tribute ceremonies during this important religious festival. Emerson [23,70] noted: 'The plumage-birds, like everything else in Hawaii, were the property of the alii of the land, and as such were protected by tabu . . . the choicest of the feathers found their way into the possession of the kings and chiefs, being largely used in payment of the annual tribute or land tax, that was levied on each ahupua'a.' [traditional land division] [57]. One cannot stop wondering about the eventual sorry fate of some hapless bird catchers that could not find any of the desired ('apapane?) birds in the mountains, and thus 'daubed the feathers red with dirt' to make them appear as the real thing before bringing them to royal tax collectors [71], p. 616, [72], p. 16.
'Kamehameha I is said to have reproved his bird-catchers for taking the life of the birds. "The feathers belong to me, but the birds themselves belong to my heirs," said the considerate monarch.' N.B. Emerson, 1895 [23], p. 110.

Bird Hunting for Featherwork
In the economic system of ancient Hawai'i, bird feathers were more highly prized than any other type of property, including palaoa pae [whale tooth], a kind of ivory monopolized as a perquisite of the king [31], p. 119. A sense of the high value attached to feathers in Hawaiian society is also shown by the alternate meanings of the word hulu [feather], 'choice' or 'esteemed' [56]. Feathers had, for centuries, been important symbols of power for Polynesians across the Pacific. A significant feather trade developed between Fiji and both Samoa and Tonga, where red Fijian parrot feathers were highly appreciated for the manufacture of fine mats and ornaments [52], p. 319. In the Society Islands, the red feathers of parrakeets had, early, become the mark of high chiefs and of gods, while the royal family of Bora Bora wore girdles of yellow feathers to denote that their line was junior to the royal house of Ra'iatea [52], p. 97. The settlers of Hawai'i kept this Polynesian tradition, and used capes and cloaks of fine meshed netting covered with red feathers that denoted chiefly rank elsewhere in Polynesia. Eventually, yellow feathers were added to generate elegant designs of crescents, triangles, and circles, and, as yellow feathers were more scarce, yellow finally became the chiefly color in Hawai'i [52], p. 264. Yellow became the exclusive color of the king-it was kapu [prohibited] to everybody else-whereas red was reserved for priests, and mixtures of these colors were used for the lesser members of nobility [6], p. 68, [73].
Feathers traditionally used for Hawaiian crafts were obtained from several birds. Malo [24], pp. 61-66, mentions the plumage of at least 24 birds, and the intended uses of their feathers; Brigham [25] lists 10 species, mostly the same ones. The mamo and the 'o'o were the main sources of yellow feathers; the 'i'iwi and the 'apapane supplied red feathers, whereas green feathers were obtained from the 'ō'ū (Psittirostra psittacea) and sometimes from the 'akialoa (Akialoa obscura). Other feather colors, such as black, grey, or white, came from a variety of birds [61]. Table 1-largely based on Malo [24]-provides a summary of birds utilized by ancient Hawaiians for featherwork, and of feather items commonly associated with each bird; more than 60% of the birds Malo mentioned were used. The vivid, much appreciated, yellow feathers of the 'ō'ō and mamo soon made them a prime target for birdhunters [4]. The birds themselves had a striking appearance (Figures 1 and 2); Emerson [23], p. 108, described the 'ō'ō as a 'proud and solitary bird,' and the mamo as 'the king of Hawaiian plumage birds . . . the king of the small birds of the uplands. ' Keauokalani also referred to the mamo as 'the chief of small, mountain birds.' [53], p. 293. Alas, both the majestic 'ō'ō and mamo became extinct by the late 19th century [1,15,21,32].
The number of birds and feathers needed to produce all of these garments is simply staggering. Over time, kāhili evolved into different shapes and sizes; some were small fly whisks, others were much larger fans [75]. Rose et al. [53] examined many large kāhili at the Bishop Museum, meticulously counting feathers and estimating the numbers of birds needed for these; up to 3120 individual 'ō'ō birds were required for just one standard. On 10 January 1855, the funeral procession of Kamehameha III (Kauikeaouli) displayed 90 kāhili, which might have easily included the feathers of some 280,000 'ō'ō birds [53], p. 279. Ancient kāhili fans were much larger than later ones; some imposing state kāhili were as high as 10 m, with 3 m of feathering [61]. The huge numbers of lei garlands manufactured must have also demanded vast quantities of feathers; Wilson and Evans [4], o-o ch, note 'That large numbers of o-o (Moho nobilis) must have been taken in former days is clear from the quantities of 'leis' or wreaths of feathers that now remain in the possession of the natives, who still set so great store by them'; Mr. Wilson was able to purchase for $50 ' . . . a small lei, for which (he) reckoned two hundred birds must have been sacrificed.' [31], p. 119, [50].   Feathers were utilized to manufacture a wide assortment of items, which included 'ahu and 'ahu'ula [ [6], [24], p. 63, [53,57], [75], p. 491, [76]. 'Ī'ī [48], loc.626, who served as a personal retainer and kāhili-bearer for Kamehameha II [49,62,77], The most sumptuous and ornate items were the full-length royal cloaks or capes, 'ahu'ula or alaneo (Figure 3), which were reserved for an ali'i ai moku [king of the whole island] and were considered his kapa wai-kaua [cloak to use during battle] [1], p. 52, [24], p. 107. Full-length cloaks were worn ceremonially, whereas the shorter capes were battle apparel [75]. As noted, cloak color was an important sign of status for Hawaiians; the greater the percentage of yellow, the higher the prestige and power of the chief [57]. Kamehameha I is the only king known to have worn a completely yellow 'ahu'ula [61], now kept at the Bishop Museum; manufacturing this celebrated cloak would have taken the golden feathers from 80,000 mamo birds [6,13,31]. Other feather cloaks may have contained more than a half million (red) feathers of 'apapane and other birds [77]. The elaborate process of assembling 'ahu'ula garments is described by Brigham [25], p. 49, and Thrum [78], p. 97. Skillful workers gently wove the feathers into a fine netting network of twisted strands of olonā (Touchardia latifolia) bark [44], p. 239. The small feathers were knotted in small bunches of two or three with the olonā, a technique called 'uo [56]; the whole procedure was laborious and intricate, and the making of a cloak might take several years. The fragrant roots of kūpaoa (Dubautia menziesii)-a common high-altitude shrub found abovẽ 1950 m [79]-were used to perfume feather capes as well as kapa pieces [57], [80], p. 66.
It may seem peculiar, but feather capes were prominently worn by ali'i during battle and, as they were very warm, chiefs did not use any malo or garment underneath [25], p. 54. The dazzling cape allowed chiefs to make sweeping gestures used to transmit battle commands, which would have been greatly enhanced by the vivid bright yellow and red cape colors [61]; the conspicuous mahiole helmets would only add to the swift recognition on the king by his fighting warriors. Shorter kīpuka capes were worn by lesser chiefs and some important warriors [23], p. 109. As cloaks were such prestigious symbols of power, triumphant warriors would take these, as well as feathered helmets and other booty, from the bodies of slain chief adversaries [24], p. 107, [74,78]. Women frequently accompanied their husbands into battle, and even fought with them [75], p. 49; a woman whose husband was killed in battle could put on his cape and continue to fight in his stead [61]. Over time, large numbers of cloaks were fashioned but, as Hawaiian chiefs often made an 'ahu'ula a token of their frienship, cloaks eventually found their way to many world museums, from Philadelphia to Sydney, from Lisbon to Berlin [25]. Hīroa [52], p. 325, wistfully commented: 'The (Polynesian) regalia and symbols of spiritual and temporal power have been scattered among the museums of other peoples.' It is noteworthy that mahiole, 'ahu'ula, and kāhili were so highly esteemed that they were all given individual names [53], p. 279. Feathered mahiole were also important items of royal battle regalia, and were reserved for high-ranking chiefs [52], p. 264. The basic helmet design consisted of a basketry frame with a prominent central crest running from the back to front of the head; Feathered mahiole were also important items of royal battle regalia, and were reserved for high-ranking chiefs [52], p. 264. The basic helmet design consisted of a basketry frame with a prominent central crest running from the back to front of the head; the ridge varied greatly in height and shape, and some mahiole displayed mushroom-shaped protuberances; feather patterns and types used were also diverse ( Figure 4). As in other Polynesian helmets [52], p. 111, an air space between the top of the head and the helmet deflected or provided some cushioning against clubs and the heavy, polished basalt slingstones [75], ideally sparing the warrior's head from being split open. However, mahiole would be ineffective when slingers flung the 'white stones found in caves' (stalagmites), which could easily shatter into fragments going in all directions, and warriors might be hit in the eyes. Common soldiers wore just simple skullcaps, probably similar to the sennit helmets of coiled work used by Atituan Polynesians [52], p. 112, [61]. Mahiole were assembled over a woven wicker frame of 'ie'ie fibers; the sturdy aerial roots of this endemic woody climbing Pandanaceae vine were baked, split, and pounded to make them supple enough for twined basketry, then were plaited into a strong foundation for the helmet [58], p. 69, [61]. Olonā strands were later used to create a string or thread to tie the feathers to the basketry [25]. Incidentally, the fleshy flower bracts and ripe fruits of the 'ie'ie were the preferred food of the extinct 'ō'ū ( Figure 5), a honeycreeper that was once a primary seed dispersal vector for this and other forest plants with small, seeded, fleshy fruits; this plant was also a favorite food for the 'alalā (Hawaiian crow), presently extinct in the wild [  Other, less conventional, uses of bird feathers took place. Canoes of Hawaiian ali'i often wore giant leis and streamers of feathers, hanging from the stern and bow pieces, that drifted in the wind, signaling its direction and strength; these may also have bestowed canoes with the spirit and protection of the bird from whose feathers the lei hulu Other, less conventional, uses of bird feathers took place. Canoes of Hawaiian ali'i often wore giant leis and streamers of feathers, hanging from the stern and bow pieces, that drifted in the wind, signaling its direction and strength; these may also have bestowed canoes with the spirit and protection of the bird from whose feathers the lei hulu manu was made [61]. Similar uses are reported from New Zealand and the Austral islands near Tahiti, where war canoes were decorated with seabirds' feathers held under the lashings of the topstrake [52], p. 171. Malo [24], p. 63, mentioned that many religious icons were decorated with feathers, including the image of Ku-ka-'ili-moku, Kamehameha's war god, that wore a headdress of yellow feathers [74]. Feathers may rarely have been an unusual source of house thatching; there are several legendary instances of houses thatched with 'royal yellow', red, or 'smokecolored' feathers, which were considered 'an exaggerated symbol of the rank of its owner' in Hawai'i, as well as in Samoa [4,23,74]. Westervelt [4], loc.2097, also mentioned ' . . . soft mats made from feathers of many birds, and sleeping-couches, better than had ever been seen before.' that were used by ali'i at special gatherings and celebrations. Hīroa [52], p. 166, a Polynesian himself, had the rare privilege of observing some Polynesian practices before these disappeared. While visiting the Marquesas in the 1920s, he gazed in admiration at 'the lissome bodies of graceful and beautiful dancing girls' who swayed to the music while displaying long red feathers of the bosun (tropic) bird (Phaethon rubricauda) attached to their fingers on both hands. He also admired magnificent headdresses for men, adorned with ʻthe long, black tail feathers of roosters, waving Hīroa [52], p. 166, a Polynesian himself, had the rare privilege of observing some Polynesian practices before these disappeared. While visiting the Marquesas in the 1920s, he gazed in admiration at 'the lissome bodies of graceful and beautiful dancing girls' who swayed to the music while displaying long red feathers of the bosun (tropic) bird (Phaethon rubricauda) attached to their fingers on both hands. He also admired magnificent headdresses for men, adorned with 'the long, black tail feathers of roosters, waving vertically above their heads' and bedecked 'with iridescent pigeon feathers.' Sorrowfully, Hīroa [5], p. 325, later avows: 'The old world created by our Polynesian ancestors has passed away, and a new world is in the process of being fashioned.' 'Let us go to the clear waters of Kalulu. There. we will dwell together in the great ravine of Palawai, where we will eat the young of the uwau bird and we will bake them in ki leaf with the sweet pala fern root.' Traditional 'ōlelo, in Thomas Thrum, 1907 [78], p. 114.

Bird Hunting as a Source of Meat
Bird meat was a common food item for ancient Hawaiians. Dye [82], p. 4, wryly observes that when the first Polynesian settlers reached Hawai'i, they found forests that offered little in the way of plant food, but birds were abundant and easily captured. Gomes [28,29] suggests that the historical importance of native birds as a meat source for maka'āinana has been traditionally overlooked-and overshadowed-by the most prominent use of regal featherwork worn by Hawaiian nobility. Bird meat may have even been the primary source of protein for native Hawaiians in some areas. Gomes [28], p. 60, reports that Kumauna, a kama'āina [native resident] of Kahuku-a sizable ahupua'a in Hawai'i island-wrote in 1873: 'In ancient days the people of Kahuku did not go fishing, but were after birds of all kinds to eat, and this is the reason all the lands on the mountain belonged to Kahuku.' Illegal trespassing into neighboring areas was common, and caused much fighting among birdhunters of adjoining districts; intruders risked having the carcasses and feathers of illegally trapped birds confiscated by the rightful rulers of neighboring areas. Other ahupua'a in Hawai'i preserve numerous testimonies emphasizing the importance of historical bird catching. These frequent fights between bird catchers probably occurred because they were willing to protect their own source of food, rather than the supply of food for their chiefs [29], p. 36.
Malo [24], pp. 61-66, provided a stark-if candid-but detailed picture of the role of birds in native diets, as he went through a veritable exotic avian smorgasbord, worthy of the most refined chef's table. Malo mentioned no less than 30 birds that were a source of food-nearly 70% of those on Table 1-most of which can be specifically identified with today's taxonomy [22,68]. Malo did not simply offer a long bird list, but also commented on their various culinary qualities: ' . . . these birds are all eatable, . . . its flesh is good for food, . . . it is delicious eating, . . . it's good eating (gamey, but very tough), . . . its body is excellent eating, . . . its flesh is sweet, . . . their flesh is fine eating, . . . it is fit for food (very fishy)'; all this suggests that he was personally acquainted with these birds. Appallingly, only one bird, the 'ula (Ciridops sp.), is mentioned as being 'celebrated in song' [24], p. 63. Keauokalani reportedly wrote in 1859 'the koa'e is a delicious bird, tasting almost like the nēnē,' and also calls'ua'u 'the most delicius of birds' [53], p. 298. The 'ua'u is the specific focus of a Section 3.4 below. Several place names indicate their significance for bird hunting. Pu'u 'ua'u [hill of 'ua'u] (O'ahu) was a nesting place for petrels before they were exterminated on that island [33], p. 26, [55], p. 206. 'Āhuli manu [bird cluster], in the north shore of O'ahu, is named ' . . . because the birds from nearby (offshore islet) Moku manu [bird island] were caught here and tied together in bunches.' [55], pp. 6, 155.
There has been much idle speculation as to whether small forest birds were killed and eaten after removing their feathers [6]. Some authors prefer to disingenuously believe that birdcatchers plucked only a few feathers from each bird, then 'set it free to raise its family and grow a new crop of feathers.' [61], [83], p. 217. Others [57], p. 287, [80], p. 7, more credibly assert that 'The meaty, flavourful large birds were regularly hunted for food.
Others only in famine times'; unfortunately, we are left wondering how often Hawaiians went hungry. Munro [33], p. 87, candidly pointed out that we do not really know whether birds were released, or killed and eaten, but that the latter was probably the case.
Numerous historical sources leave little doubt about the fate of most birds, regardless of the original reason for hunting them. Observations by the Cook expedition that reached Kaua'i on 18 January 1778 indicate that large numbers of small red birds ('i'iwi) were killed, and their feathered skins openly sold in bundles of 20 or more at the marketplace, as well as groups of bird carcasses held with a small wooden skewer run through their nostrils [6], p. 72, [25], p. 5, [53]. Emerson [23], p. 110. averred: 'The mamo, i-iwi and such birds as were destined to be eaten after being plucked, were, as soon as caught, killed by pressure over the thorax and then wrapped in the outer dried parchment of the bananastalk . . . '; he also provided some rationale for this behavior: 'In the case of the mamo, i-iwii, akakani, o-u and amakihi the extent of skin surface left bare after stripping the plumage from the bird was so considerable that it would have been an act of cruelty, if not of destruction, to have set it loose'; see [28], p. 23. It is also known that small passerine birds sometimes die of shock merely as a result of being handled [21], p. 120. Brigham [25], p. 10, told how the small 'ō'ō birds: ' . . . were a favorite article of food, and as the larder of the hunters in the mountains was poorly stocked, it seldom survived capture.' Wilson and Evans [50], p. 5, o-o ch., agree: 'The o-o is esteemed a great delicacy by the natives, and used formerly to be eaten by them, fried in its own fat.' Henshaw [1], p. 52, observed how 'birdcatchers in Kamehameha's time . . . were strictly enjoined not to kill any of the royal birds [mamo], but to turn their captives loose when stripped of their coveted yellow feathers.' However, Henshaw ironically commented: 'The forests in which the bird-catcher plied his calling was (sic) distant and deep, and it is possible that the injunction was not strictly heeded; for meat of any kind was always scarce in Hawaii and in any form was highly prized.' Unfortunately for the birds, bird killing became more efficient with the introduction of 'the quicker and more deadly shot gun, and the birds quickly met their doom' [1], [6], p. 63, [23]. Henshaw [1], p. 70, finally added: 'The above merciful and wise custom, if ever generally observed . . . died out together with the chiefs with whom it originated and with the old race of bird-catchers. ' It is relevant to know the actual fate of trapped birds; however, as Gomes [29], p. 49, perceptively points out, it is also important to understand why ancient Hawaiians hunted birds. Berger [31], p. 18, mentioned a critical point, suggesting that birds were eaten because of the protein-poor diet of Hawaiians. Other authors [13], p. 226, [53], p. 298, concur that the scarcity of protein in Hawai'i's agricultural society, and the difficulty of catching birds, make it likely that those caught for feathers were killed and eaten. Hawai'i's cultural landscape was dominated by an orderly system of agricultural fields centered on the production of starchy plant foods; two root crops,  [24], p. 228, described a ceremony in which ' . . . pigs were baked, and a fore-quarter was given to each kahuna' [priest], then the king ' . . . made an offering to his gods of four hundred pigs . . . and offered a sacrifice of human bodies on the lele' [altar]. Keauokalani [47], p. 148, mentions the ho'o-kū-kū, a celebration in which commoners honored their high chief by bringing food gifts: 'The next day bake pig, dog, turkey, chicken. Let the mountain chiefs bring petrels, geese, birds from their holes.' Dog meat, especially that of young puppies, was 'judged very tasty' by Hawaiians, who cooked them by inserting hot rocks in their cleaned abdominal cavity, then wrapping the bundle with kī leaves, or roasting them over charcoal [44], pp. 13, 53, 337, [87], p. 130. Dogs were an important portion of taxes during Makahiki festivities, when many dogs were contributed ' . . . until the ali'i pens were full of them' [24], p. 188.
Specific mentions about chicken use by Hawaiians are scarce. 'Chicken (moa), always pleasing to the gods, was once used as the most specific of food offerings' [86], p. 3. During the ho'opalau [bethrotal] period, 'the young man might send gifts to his wife-to-be, perhaps a pig, chickens, a feather lei, or a fat dog'; later, at the couple's wedding, 'In anticipation of the event, the head of the household had raised or acquired hogs, dogs, chickens.' [58], pp. 140-144, [88], p. 279. Such comments strongly suggest that chickens were, as the other animals, choice food items reserved for special occasions and festivities, and not part of everyday meals. Hīroa [52], p. 265, puts it more succintly: in ancient Hawai'i 'Pigs, dogs, and fowls were the food of the wealthy; fish remained the mainstay of the people.' Conversely, Handy and Handy [58], loc.51, challenge the assumption that Hawaiians consumed much fish: ' . . . fishing occupied a very small part of the time and interest of the majority of Hawaiians.' The rugged nature of the islands favored the dispersal of homesteads 'extending along the valleys into the heart of the mountains' rather than the development of compact villages. In contrast, the localities along the shore suitable for fishing, and favourable for clusters of dwellings, were extremely rare and far apart. Thus, ' . . . for every fisherman's house along the coasts there were hundreds of homesteads of planters in the valleys and on the slopes and plains between the shore and the forest' [57], p. 23, [89], p. 174.
We must now consider the unpleasant reality of kapu. Hawai'i was, in European terms, a feudalistic society; the ruling ali'i controlled access to resources and rigidly prescribed their use [37], p. 318, [58], loc.1344. Food taboos mainly develop to reduce the chances of communal over-exploitation [90], p. 175, however, on many Pacific islands and atolls, evolved to monopolize access to scarce resources, reserving these for the exclusive use of local rulers, and forbidding them mainly to women and children [91][92][93]. Hawaiian chiefs refined the kapu into an exceedingly complex system [94], creating ' . . . such a number of taboos that an official executioner was appointed to inflict the punishments that the gods might have overlooked' [52], p. 265. Malo [24], p. 52, meticulously catalogued the ' . . . articles of food that were set apart for the exclusive use of man, of which it was forbidden (for) the woman to eat', including pork, many types of fish, and honu [sea turtle] [95], p. 109, [96]. Women and boys were not allowed to eat pork, because this was 'the favored sacrifice food for the gods, chiefs and priests' [86], p. 7, [97], p. 312; dogs apparently were also kapu for women [57], p. 151. Kapu transgressions were no trivial matter, and ' . . . if a woman was detected in the act of eating any of these things . . . she was put to death' [24], p. 52. Particularly grievous offenses-such as forgetting an important kapu day-might be punished more severely, and all persons who lived in an ahupua'a might become subject to death [45], loc.310.
It may regrettably be concluded that all domesticated animals, and many kinds of fish, were not commonly or frequently available to most maka'āinana, thus providing a strong incentive for inland Hawaiians to hunt and consume wild birds.
'Once the ('ua'u) bird is in hand it is easily despatched (sic) by the native hunter in a neat and efficient manner. The forefinger is violently forced down the bird's throat. It is then slightly bent at the first joint so as to catch the heart and lungs, which are given a slight twist and sharp pull, with the result that the bird dies instantly, with scarcely a struggle.' William A. Bryan, 1908 [27], p. 50; see also [28], p. 180.

Case Study: Hunting of 'ua'u (Pterodroma sandwichensis)
The dark-rumped petrel is a large seabird, with a wingspan greater than 90 cm ( Figure 6); a closely related petrel species is found in the Galapagos Islands. The Hawaiian bird's name, 'ua'u, is derived from its haunting nocturnal call [1], p. 120, [27], [33], p. 26. These birds ' . . . dwell in the mountains by night, but during the day they fly out to sea to fish for food' [24], p. 64; they were once common and 'extremely abundant' along the Hawaiian archipelago 'across a range of elevations' [31,33], [98], p. 12, and sizable colonies existed in all main islands except Ni'ihau [99]. In former times, such numbers of 'ua'u returned nightly to their nests on Moloka'i that the incoming birds were said to have 'darkened the skies' [98], p. 12. Olson and James [34], p. 43, reported ''ua'u were the most abundant bird recovered from ancient bone deposits on coastal O'ahu'; 'ua'u remains were also, by far, the most common among faunal assemblages in the island of Hawai'i [12], p. 40, [41], p. 138, thus supporting the notion of their previous significance as a food source [29], p. 50.
Geographies 2021, 1, FOR PEER REVIEW 18 These birds '...dwell in the mountains by night, but during the day they fly out to sea to fish for food' [24], p. 64; they were once common and 'extremely abundant' along the Hawaiian archipelago 'across a range of elevations' [31,33], [99], p. 12, and sizable colonies existed in all main islands except Ni'ihau [100]. In former times, such numbers of 'ua'u returned nightly to their nests on Moloka'i that the incoming birds were said to have 'darkened the skies' [99], p. 12. Olson and James [34], p. 43, reported ''ua'u were the most abundant bird recovered from ancient bone deposits on coastal O'ahu'; 'ua'u remains were also, by far, the most common among faunal assemblages in the island of Hawai'i [12], p. 40, [41], p. 138, thus supporting the notion of their previous significance as a food source [29], p. 50. Dark-rumped petrels are now listed as an endangered species. They are rarely seen, as they nest almost exclusively in Haleakalā Crater (Maui), near Haleakalā's summit, at 2400-3055 m; 'ua'u live in deep, 1 to 2-but up to 10-meter-long burrows excavated in the cinder Andisols on rock ledges, below spectacular and inaccessible, 250-300 meter-tall palis [cliffs] bounded by long, alluvial/colluvial talus slopes which extend to the crater Dark-rumped petrels are now listed as an endangered species. They are rarely seen, as they nest almost exclusively in Haleakalā Crater (Maui), near Haleakalā's summit, at 2400-3055 m; 'ua'u live in deep, 1 to 2-but up to 10-meter-long burrows excavated in the cinder Andisols on rock ledges, below spectacular and inaccessible, 250-300 meter-tall palis [cliffs] bounded by long, alluvial/colluvial talus slopes which extend to the crater floor below [63,100] (Figure 7). This site makes it one of the highest colonies of nesting seabirds anywhere in the world [101]. As 'ua'u cannot readily fly from a level surface, the nesting sites on the steep Haleakalā slopes are especially suited for taking flight [102], and also provide a remote location that shelters the birds. Birds dig up burrows with their legs and wings, often excavating the loose cinder and tephra found underneath large boulders or outcrops [98]; lapilli samples at one site contained >88% coarse gravel pebbles, making it extremely easy to excavate [100], p. 228. Many tunnels, with rather unobtrusive entrances, are found along the lithologic contact at the base of basaltic alkali-olivine 'a'ā lava outcrops ( Figure 8). Some 700 established burrows have been documented in the National Park; these are recurrently utilized by petrels that return to their nest year after year [98], p. 13.
Geographies 2021, 1, FOR PEER REVIEW 19 floor below [64,101] (Figure 7). This site makes it one of the highest colonies of nesting seabirds anywhere in the world [102]. As ʻuaʻu cannot readily fly from a level surface, the nesting sites on the steep Haleakalā slopes are especially suited for taking flight [103], and also provide a remote location that shelters the birds. Birds dig up burrows with their legs and wings, often excavating the loose cinder and tephra found underneath large boulders or outcrops [99]; lapilli samples at one site contained >88% coarse gravel pebbles, making it extremely easy to excavate [101], p. 228. Many tunnels, with rather unobtrusive entrances, are found along the lithologic contact at the base of basaltic alkali-olivine 'a'ā lava outcrops (Figure 8). Some 700 established burrows have been documented in the National Park; these are recurrently utilized by petrels that return to their nest year after year [99], p. 13. A much smaller colony, with about 50 nests, was fortuitously discovered in 1990 at Mauna Loa, Hawai'i island, at 2440-2900 m [104]. This colony was much larger in 1887, when 'a considerable number (of 'ua'u) had their nests in holes in the ground... in the lava between Mauna Kea and Mauna Loa'; however, by the early 1900s, birds had been seriously affected by the proliferation of the introduced Indian mongoose (Herpestes auropunctatus), which invaded the nesting sites [1], p. 120, [50], p. 2, Uuau ch. A similar fate was met before 1908 by the dense'ua'u colonies in Moloka'i, where mongoose ate the birds and then occupied their burrows after killing the original occupants [27], p. 51. Petrels are still reported from Kaua'i, and some small colonies might yet survive in Moloka'i and Lāna'i [102,104]. Recent estimates indicate fewer than two thousand'ua'u remain in all of the the Hawaiian Islands; ~95% of these, including <650 breeding pairs, nest in Haleakalā Crater [99,102,105]. Although Maui's colony is protected within Haleakalā National Park, it was also affected by predation from mongoose and feral cats (Felis catus), which were responsible for destroying ~40% of their yearly egg and chick production before 1980, when an extensive trapping program was started [99,103,106]. A much smaller colony, with about 50 nests, was fortuitously discovered in 1990 at Mauna Loa, Hawai'i island, at 2440-2900 m [103]. This colony was much larger in 1887, when 'a considerable number (of 'ua'u) had their nests in holes in the ground . . . in the lava between Mauna Kea and Mauna Loa'; however, by the early 1900s, birds had been seriously affected by the proliferation of the introduced Indian mongoose (Herpestes auropunctatus), which invaded the nesting sites [1], p. 120, [50], p. 2, Uuau ch. A similar fate was met before 1908 by the dense'ua'u colonies in Moloka'i, where mongoose ate the birds and then occupied their burrows after killing the original occupants [27], p. 51. Petrels are still reported from Kaua'i, and some small colonies might yet survive in Moloka'i and Lāna'i [101,103]. Recent estimates indicate fewer than two thousand'ua'u remain in all of the the Hawaiian Islands;~95% of these, including <650 breeding pairs, nest in Haleakalā Crater [98,101,104]. Although Maui's colony is protected within Haleakalā National Park, it was also affected by predation from mongoose and feral cats (Felis catus), which were responsible for destroying~40% of their yearly egg and chick production before 1980, when an extensive trapping program was started [98,102,105]. Feral runaway goats (Capra hircus) were formerly abundant on the steep crater walls, where goats chose some of the same cliff ledges and outcrops where bird burrows are located as bedding sites [101,105]; however, goat activities probably did not affect the petrels adversely [103]. The roof rat (Rattus rattus) was also identified in the 1960s as an important 'uau predator [31], p. 49. Argentine ants (Linepithema humile) were first recorded in Haleakalā N.P. in 1967; however, a study showed that the alien ants are not significantly affecting the nesting success rate of the ʻuaʻu at present [107]. Ultimately, current Feral runaway goats (Capra hircus) were formerly abundant on the steep crater walls, where goats chose some of the same cliff ledges and outcrops where bird burrows are located as bedding sites [100,104]; however, goat activities probably did not affect the petrels adversely [102]. The roof rat (Rattus rattus) was also identified in the 1960s as an important 'uau predator [31], p. 49. Argentine ants (Linepithema humile) were first recorded in Haleakalā N.P. in 1967; however, a study showed that the alien ants are not significantly affecting the nesting success rate of the 'ua'u at present [106]. Ultimately, current ecological management efforts seem to have been successful, and the endangered birds are slowly increasing in number [66], p. 47, [98].
Ancient Hawaiians mercilessly hunted 'ua'u, and habitually utilized them as a source of meat [29]. Young birds were esteemed as a great delicacy for their tasty flesh [24], p. 64, [50] and were reserved for the ali'i, hence were kapu to the common people; old birds tasted too strong and were unpleasant to eat, and needed to be salted for a considerable time, thus probably were not kapu [28], [33], p. 26, [63]. 'Ua'u chicks were so valuable a commodity that some hunters may have even stolen young birds from neighboring lands, obeying the commands of their ali'i [29], p. 48. 'Ua'u were captured with a variety of methods; Gomes [28], p. 176, provides an excellent analysis of this knotty topic. Adult birds returning in the evening from the sea to their rookeries used specific routes along the coast and followed flight corridors inland. Large nets were deployed in these areas; as hunters imitated their call, birds would descend to the ground and be trapped [26], p. 463, [27], p. 49, [33], p. 26, [63]. Specially crafted nets in the shape of a bag with a wide-spreading opening were also placed in ravines or narrow valleys to intercept the paths of flying birds [28], p. 203.
A widespread and effective strategy was to catch the petrels directly in their nesting burrows during the Kaulua  (Table 1) would return from the sea to nest on cliffs in late July, when their very loud and noticeable nasal calls would alert birdcatchers that the hunting season had come [28], p. 187, [31], p. 47, [33], p. 25. At this time, petrels would be captured and dragged out by hand from their burrows. However, as Bryan [27], p. 50, noted, 'Digging out an Uau is not the easy and pleasant task one might imagine.' After finding their burrows, birds inside needed to be precisely located-not an easy task-but once the hunter's hand touched a bird, it ' . . . started to bite with their hooked, pincer-like bill, and kick and scratch with their feet most savagely'. To avoid being wounded, hunters would often thrust the bird's upper mandible through the lower at its base [28], p. 190, or instantaneously kill it in an even more effective but cruel manner (see last epigraph above).
Young birds in their downy stage would be taken later, in late September or early October [33], p. 26, when chicks looked much like a plump ball of down and often weighed twice as much as an adult bird [98]. Chicks could not present such resolute resistance, and they were simply ' . . . pulled from the holes by means of a stick that is split at one end. The split end is twisted into the down, and in this manner it is easily pulled forth' [1], p. 120, [26], p. 462, [27], p. 51. 'Ua'u are long-lived birds, perhaps up to 25-30 years [98], p. 13; as adult birds returned to their burrows annually, an ingenious method for trapping young birds was devised by birdcatchers. After determining the position of a chick inside a burrow, a vertical hole was excavated directly above it, and the bird captured; the hole was then covered with a fitted stem segment of arborescent fern-probably hāpu'u (Cibotium menziesii); the following year, hunters would just relocate the hole, pull out the wedged fern piece, and remove the newly hatched chick [28], p. 182.
'Ua'u hunting in Maui was traditionally centered along the western rim of Haleakalā Crater, precisely where the bird colony still survives [102]. Archaeological excavation of 57 campsites at 2020-3030 m along the inner crater rim provided evidence of repeated short-term visits associated with the collection of birds for food and feathers, and with quarrying of high-quality basalt outcrops [42]; camps also preserved abundant lithic tools, such as flake-knives and scrapers, presumably used for processing captured birds and many bird bones-some of them charred [66], pp. 88, 98. Sites were recurrently but intensely occupied ca A.D. 1410-1670; abundant bird bones showing evidence of human consumption indicate hunters were particularly targeting the 'ua'u population. Bone analysis revealed that nine additional native bird species, including nēnē (Branta sandvicensis), 'alalā (Corvus hawaiiensis), and oloma'o (Myadestes lanaiensis), were also subjected to human predation [66], p. 155. Bird catching ceased in this area immediately after European contact (A.D. 1778) [43]. Intensive petrel hunting also took place in the island of Hawai'i. Many 'ua'u bones, ostensibly chewed by Hawaiian hunters, were found in Hopukane Shelter Cave, at~3050 m, on the south side of Mauna Kea [102], p. 327. Bird-bone deposits left by prehistoric hunters in 14 high-altitude lava tubes on Mauna Loa showed that 'ua'u comprised 94.7% of bones collected; an additional 4.2% belonged to nēnē, now the only surviving Hawaiian goose [21].
'Had not Homo sapiens arrived in these islands some 16 centuries ago, these birds would still be alive today-skin, feathers, songs, enzymes and all'. Storrs L. Olson and Helen F. James, 1991 [18], p. 7.

Discussion
Ancient Hawaiians probably viewed native birds as an inexhaustible resource, and seem to have treated them as such. Bird hunting was also important in other Polynesian islands. Maories captured, in New Zealand, kaka (Nestor meridionalis) parrots, where ' . . . an expert bird-catcher will sometimes bag as many as 300 in the course of a day'; this resulted in ' . . . 10,000 to 12,000 of these birds . . . killed during a good rata season' in some districts [50], p. 4, o-o ch.
Milberg and Tyrberg [36] argue that there is still a pervasive notion-the 'environmentalist myth'-that 'primitive' people are 'natural conservationists' living in a state of 'ecological balance,' without causing any significant deleterious effects to their environment [93,94,108]; this naive view, derived from a romanticized concept of the 'noble savage'-unfairly attributed to J.J. Rousseau-is simply untenable in the 21st century. Kirch [10] criticized the idea that ancient Hawaiians lived in symbiotic harmony with nature, and thought it should not go unchallenged. Although it is believed that native Hawaiian avifauna was affected by several interdependent factors (Introduction), the extensively documented bird overkill by humans must have played a crucial role in their decline. The extent to which humans contributed to bird demise may be unclear; however, as Berger [31], p. 114, argues, some birds-such as the 'ō'ō-went extinct in other islands (Figure 1), whereas the sole surviving 'ō'ō species in Kaua'i has 'fewer yellow feathers than any of the other species'; this possibly helped it escape being overhunted. The 'ō'ū ( Figure 5) was at one time ' . . . common to all the larger Hawaiian islands' [70], p. 51; 'Next to Vestiaria coccinea, it is perhaps the most noticeable bird of the forest-birds of the islands' [50], Ou ch.; however, its ' . . . conspicuous bright yellow head and neck plumage' were eagerly used for highly valued leis. Now the bird is gone. Humans avidly consumed 'ua'u meat, severely restricting the distribution of one of the most abundant birds in the Hawaiian Islands into just a minute fraction of its former range. Now the 'ua'u is an endangered bird, likely to become extinct in the near future. That is the undeniable legacy of overexplotation and disregard of ancient Hawaiians toward their magnificent avifauna [21], p. 203, [31], p. 18.
'The evolutionary play was going on in the evolutionary theater when as a part of the plot men entered, romping and stamping on the stage and bringing it almost to the point of collapse' Ramón Margalef López, 1968 [109], p. 96.

Conclusions
Overhunting did not help many other bird species, which ended up adorning the garments of the Hawaiian nobility, or filling the bellies of the common people. Most birds victimized by Hawaiians are now either extinct or endangered; many are simply unknown to us, and their names have faded from Hawaiian memory (Table 1) [22]. Sadly, it is not just the birds that have vanished, but their collective unique identities have been erased as well: 'When the birds disappear, so do their Hawaiian names. This means that as bird sounds are silenced, the chants that transmitted their names and associated stories also disappear' [110]. The birds may be gone, forever, but they should not be forgotten.
Funding: This research received no external funding.

Data Availability Statement:
No additional data is available.