The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 50 | next 50) (20 | 50 | 100 | 250 | 500)- Abeillia (1 member)
- Abroscopus (3 members)
- Aburria (1 member)
- Acanthagenys (1 member)
- Acanthidops (1 member)
- Acanthis (3 members)
- Acanthisitta (1 member)
- Acanthisittidae (3 members)
- Acanthiza (14 members)
- Acanthizidae (16 members)
- Acanthoptila (1 member)
- Acanthorhynchus (2 members)
- Acanthornis (1 member)
- Accipiter (47 members)
- Accipitridae (74 members)
- Accipitriformes (4 members)
- Aceros (1 member)
- Acestrura (0 members)
- Achaetops (1 member)
- Acridotheres (11 members)
- Acritillas (1 member)
- Acrobatornis (1 member)
- Acrocephalidae (7 members)
- Acrocephalus (42 members)
- Acropternis (1 member)
- Acryllium (1 member)
- Actenoides (6 members)
- Actinodura (8 members)
- Actitis (2 members)
- Actophilornis (2 members)
- Adelomyia (1 member)
- Aechmophorus (2 members)
- Aechmorhynchus (1 member)
- Aegithalidae (3 members)
- Aegithalos (9 members)
- Aegithina (4 members)
- Aegithinidae (1 member)
- Aegolius (4 members)
- Aegotheles (9 members)
- Aegothelidae (2 members)
- Aegypius (1 member)
- Aenigmatolimnas (0 members)
- Aepyornis (1 member)
- Aepypodius (2 members)
- Aerodramus (28 members)
- Aeronautes (3 members)
- Aethia (4 members)
- Aethomyias (0 members)
- Aethopyga (22 members)
- Afghanistan (0 members)
