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 :

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 ) .

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 .

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 )

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 .

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 .

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 ) .

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 .

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 ) .
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