Pterylosis of Cypselus Apus

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“Fig. 24. - Pterylosis of Cyoselus apus, drawn by Coues after Nitzsch; right hand upper, left hand lower, surface. 1 spinal tract; 2. humeral; 3. femoral; 4. capital; 5. alar; 6. caudal; 7. crural; 8. ventral.” Elliot Coues, 1884

Keywords

birds, capital, ornithology, bird anatomy, feathers, ventral, femoral, Crural, Caudal, humeral, pterylosis, feather structures, Cyoselus apus, spinal tract, alar, external bird parts

Galleries

Bird Anatomy

Source

Elliot Coues Key to North American Birds (Boston, MA: Estes and Lauriat, 1884)

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