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The Food and Feeding Behaviour of the Jackdaw, Rook and Carrion Crow
J. D. Lockie
Journal of Animal Ecology
Vol. 25, No. 2 (Nov., 1956), pp. 421-428
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/1935
Page Count: 8
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1. The analysis of food from gizzards shows that rooks and jackdaws tend to eat different kinds of animals. Carrion crows eat the same kinds of animals as are eaten by rooks and jackdaws and, in addition, other prey. Grain is eaten by all three species but only jackdaws eat weed seeds to an appreciable extent. The differences in diet are most pronounced in mid-winter and least so from April to June and in Autumn. 2. The feeding methods used on grassland are described and the relative proportion of each used by rooks and jackdaws given. These observations corroborate the conclusions drawn from a microscopic analysis of gizzard contents.
Journal of Animal Ecology © 1956 British Ecological Society