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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. Acanthis ‎(2 members)
7. Acanthisitta ‎(1 member)
8. Acanthisittidae ‎(2 members)
9. Acanthiza ‎(13 members)
10. Acanthizidae ‎(14 members)
11. Acanthoptila ‎(1 member)
12. Acanthorhynchus ‎(2 members)
13. Acanthornis ‎(1 member)
14. Accipiter ‎(47 members)
15. Accipitridae ‎(73 members)
16. Accipitriformes ‎(4 members)
17. Aceros ‎(5 members)
18. Achaetops ‎(1 member)
19. Acridotheres ‎(10 members)
20. Acritillas ‎(1 member)

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