Corvus americanus, ♂ II. 243, pl. 37, fig. 5

carnivorus, ♀ II. 234, pl. 37, fig. 6

caurinus, ♂ II. 248, pl. 37, fig. 3

cryptoleucus, II. 242, pl. 37, fig. 8

floridanus, II. 247, pl. 37, fig. 9

mexicanus, ♂ II. 233, pl. 37, fig. 4

ossifragus, II. 251, pl. 37, fig. 7

A History of North American Birds; Land Birds; Vol. 3 of 3 · 第 487 / 607 题