The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 100 | next 100) (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 (15 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)
- Aethopyga (22 members)
- Afghanistan (0 members)
- Africa (63 members)
- Afropavo (1 member)
- Afrotis (2 members)
- Agamia (1 member)
- Agapornis (9 members)
- Agelaioides (2 members)
- Agelaius (5 members)
- Agelastes (2 members)
- Agelasticus (3 members)
- Aglaeactis (4 members)
- Aglaiocercus (3 members)
- Agraphospiza (1 member)
- Agricola (2 members)
- Agriocharis (0 members)
- Agriornis (5 members)
- Agropsar (2 members)
- Agyrtria (0 members)
- Aidemosyne (1 member)
- Ailuroedus (10 members)
- Aimophila (3 members)
- Aix (2 members)
- Ajaia (1 member)
- Akialoa (4 members)
- Akletos (2 members)
- Alabama (1 member)
- Alaemon (2 members)
- Alario (0 members)
- Alaska (2 members)
- Alauda (4 members)
- Alaudala (5 members)
- Alaudidae (22 members)
- Albania (2 members)
- Alberta (9 members)
- Alca (1 member)
- Alcedinidae (20 members)
- Alcedo (12 members)
- Alcidae (11 members)
- Alcippe (19 members)
- Aleadryas (1 member)
- Alectoris (7 members)
- Alectroenas (4 members)
- Alectrurus (2 members)
- Alectura (1 member)
- Alethe (2 members)
- Algarve (3 members)
- Algeria (0 members)
- Alipiopsitta (1 member)
- Alisterus (3 members)
- Alle (1 member)
- Allenia (1 member)
- Alopecoenas (0 members)