SIRS,---I read with much interest two notes on the stripping of lime twigs b y Rooks (antea, p . 36). I t would n o t be wise t o conclude t h a t every twig found in this condition had been barked b y Rooks. I have watched a squirrel stripping twigs in a similar way for nestbuilding. She did tlie job thoroughly. The twigs she selected were young shoots, and she removed the whole of the bark from ...

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