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Foraging Success of Cattle Egrets, Bubulcus ibis

James J. Dinsmore
The American Midland Naturalist
Vol. 89, No. 1 (Jan., 1973), pp. 242-246
DOI: 10.2307/2424157
Stable URL: http://www.jstor.org/stable/2424157
Page Count: 5
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Foraging Success of Cattle Egrets, Bubulcus ibis
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Abstract

Comparisons of cattle egrets (Bubulcus ibis) foraging with cows and alone show that those foraging with cows capture more food items and take fewer steps to do so. Egrets are about 3.6 times as efficient when foraging with cows as when foraging alone. Cattle egrets foraging behind moving farm machinery capture food at about the same rate as those foraging with cows but they take more steps. Foraging with farm machinery is more efficient than foraging alone. The association of cattle egrets with cows clearly is advantageous to the egret but the possible beneficial effects to cows have not been shown.

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