Observations on Bird Behaviour


DR. K. G. BRITTON has recently described the behaviour of "a deluded sparrow"1. I can quote an almost identical case which happened some years ago. Early one summer morning I was awakened by a cock house-sparrow pecking violently at my bedroom window, which faced nearly due east. This was repeated the next morning. Between onslaughts at the window glass the sparrow clung to ivy which covered the deeply recessed sides of the window. This continued for a week, after which time the sparrow disappeared.

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