Effective distraction display by Mallard.--As only a few observations have been recorded indicating the effectiveness of distraction display by a parent bird in deflecting the attention of a potential predator from the young [Bird Display, pp. 104-105) the following incident may be of interest. On April 18th, 1953, a Mute Swan (Cygnus olor) whose mate was incubating on the margin of a pond attack...
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