Similar to 砂嚢

Proventriculus

Crop (anatomy)

Syrinx (bird anatomy)

Keel (bird anatomy)

Pharynx

Esophagus

Gallbladder

Ornithology

Dactyly

American Ornithological Society

The Birds of America

British Ornithologists' Union

Feather

Flight feather

Bird anatomy

Crest (feathers)

Bird anatomy#Respiratory system

Anting (behavior)

Beak

Cornell Lab of Ornithology

International Ornithological Congress

International Ornithologists' Union

Furcula