Category:鳥類学

Bird anatomy

Bird migration

Flight feather

Wing

Bird anatomy#Respiratory system

Crop (anatomy)

Gizzard

Beak

Flight

Anting (behavior)

Yamashina Institute for Ornithology

Comb (anatomy)

Furcula

Keel (bird anatomy)

Syrinx (bird anatomy)

Crop milk

The Birds of America

Proventriculus

Tarsometatarsus

Gular skin

International Ornithological Congress

American Ornithological Society

British Ornithologists' Union

International Ornithologists' Union