✦ LIBER ✦

Discovery of the Egg of the Black Swift (Cypseloides niger borealis)

✍ Scribed by A. G. Vrooman

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

The "Downy" Nestling Plumage of Swifts o

✍ Collins, Charles T. 📂 Article 📅 1963 🏛 University of California Press 🌐 English ⚖ 612 KB

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✍ M. H. Gormley 📂 Article 📅 1888 🏛 University of California Press 🌐 English ⚖ 141 KB

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