Accipiter, Genus
Accipitridae, Familia
Accipitriformes, Ordo
Acrocephalus, Genus
Actitis, Genus
Aegithalidae, Familia
Aegithalos, Genus
Aegolius, Genus
Aegypius, Genus
Alauda, Genus
Alaudidae, Familia
Alca, Genus
Alcedinidae, Familia
Alcedo, Genus
Alcidae, Familia
Alectoris, Genus
Alle, Genus
Alopochen, Genus
Amandava, Genus
Anas, Genus
Anatidae, Familia
Animalia, Regnum
Anser, Genus
Anseriformes, Ordo
Anthus, Genus
Apodidae, Familia
Apodiformes, Ordo
Apus, Genus
Aquila, Genus
Ardea, Genus
Ardeidae, Familia
Ardeola, Genus
Arenaria, Genus
Asio, Genus
Athene, Genus
Aves, Classis
Aythya, Genus