A History of North American Birds; Land Birds; Vol. 3 of 3 — Archibuteo lagopus, var. sancti-johannis (Penn.). ROUGH-LEGGED HAWK; BLACK HAWK.

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A History of North American Birds; Land Birds; Vol. 3 of 3 Volume 3 of 3 · Archibuteo lagopus, var. sancti-johannis (Penn.). ROUGH-LEGGED HAWK; BLACK HAWK. · ch 113/252

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