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Family Characteristics of Birds," by Cyril A. Stebbins and Robert C. Stebbins in 2025 | Bird drawings, Animal drawings, Bird illustration
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yosemite.ca.us
Family Characteristics of Birds," by Cyril A. Stebbins and Robert C. Stebbins
Birds of Yosemite National Park, Sierra Nevada mountains, California, with descriptions, key, and checklist. By Cyril A. Stebbins and Robert C. Stebbins (1954, 1963)
