According to the International Union for Conservation of Nature (IUCN), 77 bird species in the United States are threatened with extinction. [1] The IUCN has classified each of these species into one of three conservation statuses: vulnerable VU, endangered EN, and critically endangered CR (v. 2013.2, the data is current as of March 5, 2014 [1] ).
Family Diomedeidae (albatrosses)
Family Procellariidae (shearwaters)
Family Hydrobatidae (storm petrels)
Family Anatidae (ducks, geese, and swans)
Family Cathartidae (New World vultures)
Family Phasianidae (pheasants)
Family Rallidae (rails)
Family Gruidae (cranes)
Family Laridae (gulls)
Family Scolopacidae (waders)
Family Alcidae (auks)
Family Psittacidae (African and neotropical parrots)
Family Picidae (woodpeckers)
Family Vireonidae (vireos)
Family Corvidae (crows and jays)
Family Hirundinidae (swallows)
Family Turdidae (thrushes)
Family Mimidae (mimids)
Family Motacillidae (wagtails and pipits)
Family Parulidae (New World warblers)
Family Acrocephalidae (marsh- and tree-warblers)
Family Emberizidae (New World sparrows)
Family Icteridae (New World blackbirds)
Family Fringillidae (finches)
Family Monarchidae (monarch flycatchers)
Located about 2,300 miles (3,680 km) from the nearest continental shore, the Hawaiian Islands are the most isolated group of islands on the planet. The plant and animal life of the Hawaiian archipelago is the result of early, very infrequent colonizations of arriving species and the slow evolution of those species—in isolation from the rest of the world's flora and fauna—over a period of at least 5 million years. As a consequence, Hawai'i is home to a large number of endemic species. The radiation of species described by Charles Darwin in the Galapagos Islands which was critical to the formulation of his theory of evolution is far exceeded in the more isolated Hawaiian Islands.
Hawaiian honeycreepers are a group of small birds endemic to Hawaiʻi. They are members of the finch family Fringillidae, closely related to the rosefinches (Carpodacus), but many species have evolved features unlike those present in any other finch. Their great morphological diversity is the result of adaptive radiation in an insular environment. Many have been driven to extinction since the first humans arrived in Hawaii, with extinctions increasing over the last two centuries following European discovery of the islands, with habitat destruction and especially invasive species being the main causes.