Further remarks on discoloration in House Sparrows Sirs,--The observations of C. J. O. Harrison (Brit. Birds, 56: 296-297) on 'industrial' discoloration in House Sparrows (Passer domesticus) and other birds prompt us to record information on an allied problem. From 22nd to 26th October 1962 one of us, ably assisted by Roger Bailey, collected 207 House Sparrows from the city dump at Oxford, England. ...

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