Jones, P. H, Dickinson, H. F, Schaefer, J, Redman, P. S, Hickling, R. A. O, Robertson, A. W. P, Pochin, R. E, Jones, P. H, Dickinson, H. F, Schaefer, J, Redman, P. S, Hickling, R. A. O, Robertson, A. W. P, Pochin, R. E, Jones, P. H, Schaefer, J, Hickling, R. A. O & Redman, P. S / December 1956 – vol. 49, issue 12–⁠512

I N T E R P R E T A T I O N O F V A R I A T I O N AMONG T H E YELLOW WAGTAILS S I R S , -- May I ask a little of your space in which to comment on some points in Dr. Mayr's summing-up (antea, pp. 115-119) of our present state of knowledge of the Yellow Wag-tail (Motacilla flava) complex? It is, as you say in your footnote (p. 118)), a sobering discussion, and I do not take it in the least ill if "dr...

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