There are about 9,993 living species of birds cognize by scientists . A collaboration between scientists at Yale and the Zoological Society of London ( ZSL ) have analyzed all of them and watch the existence ’s avian biodiversity .   This is part of ZSL’sEvolutionary Distinct and Globally Endangered ( EDGE)species inclination , and they have ranked 100 birdie species base on conservation status and how unusual they are compared to other birds .

The lean includes representative from 20 of the 29 known purchase order . The hiss are refuse in population for a assortment of reasons , though poach , habitat destruction , and introduced predators are the most common threat .

The top 15 are name here with details and photograph , and the rest of the inclination follows below :

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1.Giant Ibis(Thaumatibis Gigantea )

Image credit : Henrick   Grönvold

TheGiant Ibisis critically scupper , with only about 230 mating pairs left in the wilderness . Most survive members hold up in Cambodia , though there are a few living in Laos and Vietnam . This is the big of the ibises , measure up to 100 cm ( 39 in ) grandiloquent and press up to 4.2 kilo ( 9.3 lb ) .

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2.New Caledonian Owlet - nightjar(Aegotheles savesi )

icon credit : Joseph Smidt

The conservation statusof this bird , which is endemical to New Caledonia , is n’t well known . It is believed that there are likely less than 50 individuals remain , but scientists have n’t seen any of this species since 1998 , which is the only sighting since 1960 .

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3.California Condor(Gymnogyps californianus )

figure of speech credit : Stacy via WikiMedia   Commons

In 1987 , there were so fewCalifornia Condorsthat all 21 remaining soul were pull together and the species was hold extinct in the wild . Through dedicated breeding program , the birds were reintroduced into protect areas in 1991 . There are now over 237 animation in the wild . These immense birds have a 3 MB ( 9.8 ft ) wingspan and weigh up to 12 kilo ( 26 lbs )

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4.Kakapo(Strigops habroptila )

Image citation : Mnolf   via WikiMedia Commons

Thisnocturnal flightless bird , autochthonous to New Zealand , is critically endangered with only 130 violent individuals remain . The kakapo is the heaviest species of parrot , weighing up to 4 kg ( 9 lb ) when it reaches adulthood .

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5.Kagu(Rhynochetos jubatus )

Image mention : Scott Meyer

TheKaguis endemic to New Caledonia and has a structure that is only see in members of this species : nasal corns . This is a structure which covers the nostril , which is believed to shield dirt from entering the nostrils when the Bronx cheer grasp for insects .

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6.Bengal Florican(Houbaropsis bengalensis )

range of a function course credit : Richard Leydekker

There are likely fewer than 500 adults stay ofthis mintage , which endure in isolated populations in India and Southeast Asia . This species is the most threatened of all bustards , which are large terrestrial dame . Bengal Floricans rise up to 68 centimetre ( 27 in ) in height and press up to 1.9 kg ( 4.2 lbs ) .

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7.Forest Owlet(Heteroglaux blewitti )

Image credit : Dr. Raju   Kasambe

This owlis endemic to India and was first think to be extinct in 1884 . A small population was come upon in 1997 and only 25 birds have been located since 2000 , though it is estimated that there could be as many as 250 individuals remain .

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8.Philippine Eagle(Pithecophaga jefferyi )

Image credit rating : Harry Balais

Thiseagleis indigenous to the Philippines and grows to an incredible 102 cm ( 3.4 foot ) tall and can weigh up to 8 kg ( 17.6 pound ) . Its crest of feathers resembles the mythical griffin , which is part Panthera leo , part bird of Jove . Estimates on the bit of fosterage pairs varies , and could be as few as 82 or as many as 233 ( which really is n’t that many ) .

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9.Christmas Island Frigatebird(Fregata andrewsi )

Image credit rating : Shah Jahan

This birdis endemic to the Christmas Island , Australia . Its top vulture is the sensationalistic crazy ant , which was inadvertently introduced via patronage ships . The emmet attack the birds during spawn season .

10.Sumatran Ground - cuckoo(Carpococcyx viridis )

This birdisendemic to Sumatraand can acquire up to 55 centimeter ( 22 in ) in length . There are estimate to be fewer than 250 individuals left . Over a 90 class full point , the bird has only been spotted double ; most recently from a tiger photographic camera trap in 2006 , though its call was identified in 2007 .

11 . Spoon - billed Sandpiper

12 . Northern Bald Ibis

13 . Plains - rover

14 . New Zealand Storm - petrel

15 . Hooded Grebe

16 . White - shouldered Ibis

17 . Macrocephalon maleo

18 . Black - hooded Coucal

19 . Madagascar Serpent - eagle

20 . Dwarf Olive Ibis

21 . Rufous Scrub - wench

22 . Noisy Scrub - bird

23 . Junin Grebe

24 . White - collar Kite

25 . Congo Bay - bird of Minerva

26 . White - eyed River - martin

27 . flushed - headed Vulture

28 . Secretarybird

29 . Peruvian Diving - petrel

30 . Egyptian Vulture

31 . St Helena Plover

32 . Australian Painted Snipe

33 . Cuban Kite

34 . Tooth - billed Pigeon

35 . Nahan ’s Francolin

36 . Sulu Hornbill

37 . Shoebill

38 . Purple - fly Ground - dove

39 . Asian Crested Ibis

40 . Sangihe Shrike - thrush

41 . Jerdon ’s Courser

42 . Lesser Florican

43 . Kokako

44 . Rufous - headed Hornbill

45 . Masked Finfoot

46 . Bahia Tapaculo

47 . undulate Albatross

48 . Stresemann ’s Bristlefront

49 . Sociable Lapwing

50 . Eskimo Curlew

51 . Slender - billed Curlew

52 . Bannerman ’s Turaco

53 . Ashy Storm - petrel

54 . Siberian Crane

55 . White - throated tempest - petrel

56 . Juan Fernandez Firecrown

57 . Dark - winged herald

58 . Uluguru Bush - shrike

59 . Polynesian Ground - Columba

60 . Sichuan Jay

61 . Mountain Serpent - eagle

62 . Sulu Bleeding - bosom

63 . Zapata Rail

64 . Mindoro Bleeding - heart

65 . Kaka

66 . Negros Bleeding - heart

67 . Black Stilt

68 . Makira Moorhen

69 . Great Indian Bustard

70 . Abbott ’s Booby

71 . Kittlitz ’s Murrelet

72 .   Titicaca Grebe

73 . Greater Adjutant

74 . Western Bristlebird

75 . Eastern Bristlebird

76 . Shore Plover

77 . Udzungwa Forest - partridge

78 . Madagascar Pisces - bird of Jove

79 . White - bellied Heron

80 . Subdesert Mesite

81 . Long - whiskered Owlet

82 . Philippine Cockatoo

83 . Spix ’s Macaw

84 . South Island Wren

85 . Crow Honeyeater

86 . Northern Brown Kiwi

87 . Banded Ground - cuckoo

88 . Flores Hawk - bird of Jove

89 . Tachira Antpitta

90 . Beck ’s Petrel

91 . Cebu Flowerpecker

92 . Blue - eyed Ground - dove

93 . Javan Trogon

94 . Pulitzer ’s Longbill

95 . Alagoas Antwren

96 . Pernambuco Pygmy - owl

97 . Jamaica Petrel

98 . Grenada Dove

99 . Wood Snipe

100 . Rio de Janeiro Antwren