IN reference to Mr. David Lack's note on Blackbirds (Turdus m. merula) singing in London at the end of January (antea, Vol. xxxviii, p. 116), in some parts of London such as Kensington, where there are many houses with gardens, it is quite exceptional for Blackbirds not to be singing then. Even in the terrible winter of 1940 a Blackbird sang on January 7th, and I heard several singing on February ...

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