WHEN reading Mr. D. Lack's article on the Chaffinch (antea, p. 216), I was particularly interested in the paragraph on " female song." Just over a year ago (early in March, 1940) I heard at Brent Park, Hendon, a bird singing, which I did not recognize at once. The song was similar to the first notes of a typical Chaffinch song, but the ending was missing and some harsh, guttural thrush-like notes we...

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