The Sequence of Plumages of the Rook, With Special Reference to the Moult of the " Face."
01 May 1963
Main paper
I T has always been a disputed point as to whether the Rook (Oorvus f. frugihgus) gets its bare " face " by means of abrasion of the feathers or by a moult. Most ornithologists have favoured the moult theory or have regarded it as a " natural peculiarity....
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