Note 18 — NATURAL HISTORY OF CAGE BIRDS.
Reading edition
The rook, (Corvus frugilegus, Linnæus,) seems here to be confounded with the carrion crow. I say nothing about this species, as I have never heard of one being tamed or instructed. It is about the size of the carrion crow, and chiefly differs from it in the base of the beak being naked, and having a rough scabrous skin.—Translator.