Letter

01 August 1936 Comments Letters SIRS,--The Rev. J. M. McWilliam in his letter on the above (antea, p . 56) remarks in his closing paragraph t h a t he " cannot remember seeing any notes on t h e effect of the angle of sunlight on t h e apparent colour of birds." We would refer Mm to our...
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Letters

01 February 1935 Comments Letters SIRS,--May I say something on this vexed subject ? I speak of those territorial species whose young depend upon insects for food. Three sets of facts seem connected :-- (i) T h a t in a cold and wet breeding season we find infertile eggs, chicks dead in t...
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