IN I044 one of us (K.P.) undertook an intensive study of the nesting of the Yellowhammer {Emberiza ciirinclla) near Oxford. In conversation, it was found that this confirmed the seasonal variations in clutch-size found for the Robin (Erithacus rubccula) by the other (Lack, 1946). R.P. then prepared a summary of his observations, but could not revise this for the press owing to absence abroad. His ...
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