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The following categories exist in the wiki.

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1. Abeillia ‎(1 member)
2. Abroscopus ‎(3 members)
3. Aburria ‎(1 member)
4. Acanthagenys ‎(1 member)
5. Acanthidops ‎(1 member)
6. Acanthisitta ‎(1 member)
7. Acanthisittidae ‎(2 members)
8. Acanthiza ‎(13 members)
9. Acanthizidae ‎(14 members)
10. Acanthoptila ‎(1 member)
11. Acanthorhynchus ‎(2 members)
12. Acanthornis ‎(1 member)
13. Accipiter ‎(51 members)
14. Accipitridae ‎(67 members)
15. Aceros ‎(11 members)
16. Achaetops ‎(1 member)
17. Acridotheres ‎(9 members)
18. Acrobatornis ‎(1 member)
19. Acrocephalus ‎(37 members)
20. Acropternis ‎(1 member)
21. Acryllium ‎(1 member)
22. Actenoides ‎(6 members)
23. Actinodura ‎(7 members)
24. Actitis ‎(2 members)
25. Actophilornis ‎(2 members)
26. Adelomyia ‎(1 member)
27. Aechmophorus ‎(2 members)
28. Aegithalidae ‎(3 members)
29. Aegithalos ‎(6 members)
30. Aegithina ‎(4 members)
31. Aegithinidae ‎(1 member)
32. Aegolius ‎(4 members)
33. Aegotheles ‎(9 members)
34. Aegothelidae ‎(2 members)
35. Aegypius ‎(1 member)
36. Aenigmatolimnas ‎(1 member)
37. Aepyornis ‎(1 member)
38. Aepypodius ‎(2 members)
39. Aerodramus ‎(28 members)
40. Aeronautes ‎(3 members)
41. Aethia ‎(4 members)
42. Aethopyga ‎(17 members)
43. Africa ‎(56 members)
44. Afropavo ‎(1 member)
45. Agamia ‎(1 member)
46. Agapornis ‎(9 members)
47. Agelaioides ‎(1 member)
48. Agelaius ‎(8 members)
49. Agelastes ‎(2 members)
50. Aglaeactis ‎(4 members)
51. Aglaiocercus ‎(3 members)
52. Agriornis ‎(5 members)
53. Ailuroedus ‎(4 members)
54. Aimophila ‎(14 members)
55. Aix ‎(2 members)
56. Ajaia ‎(1 member)
57. Alabama ‎(1 member)
58. Alaemon ‎(2 members)
59. Alaska ‎(1 member)
60. Alauda ‎(4 members)
61. Alaudidae ‎(20 members)
62. Albania ‎(2 members)
63. Alberta ‎(9 members)
64. Alca ‎(1 member)
65. Alcedinidae ‎(19 members)
66. Alcedo ‎(15 members)
67. Alcidae ‎(11 members)
68. Alcippe ‎(18 members)
69. Aleadryas ‎(1 member)
70. Alectoris ‎(7 members)
71. Alectroenas ‎(4 members)
72. Alectrurus ‎(2 members)
73. Alectura ‎(1 member)
74. Alethe ‎(5 members)
75. Alisterus ‎(3 members)
76. Alle ‎(1 member)
77. Allenia ‎(1 member)
78. Alophoixus ‎(7 members)
79. Alopochelidon ‎(1 member)
80. Alopochen ‎(1 member)
81. Amadina ‎(2 members)
82. Amalocichla ‎(2 members)
83. Amandava ‎(3 members)
84. Amaurocichla ‎(1 member)
85. Amaurolimnas ‎(1 member)
86. Amaurornis ‎(9 members)
87. Amaurospiza ‎(3 members)
88. Amazilia ‎(33 members)
89. Amazona ‎(31 members)
90. Amazonetta ‎(1 member)
91. Amblycercus ‎(1 member)
92. Amblyornis ‎(4 members)
93. Amblyospiza ‎(1 member)
94. Amblyramphus ‎(1 member)
95. Ammodramus ‎(9 members)
96. Ammomanes ‎(4 members)
97. Ammoperdix ‎(2 members)
98. Ampeliceps ‎(1 member)
99. Ampelioides ‎(1 member)
100. Ampelion ‎(2 members)

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