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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)

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