The Tendency of the blackbird and Song-Thrush to breed in their birthplaces
01 November 1947
Main paper
THE degree of inbreeding of a population is of obvious importance from the point of view of the differentiation of races and species. An analysis was therefore made of the ringing returns for British Blackbirds (Turdus m. merula) and Song-Thrushes (Turdus...
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