Letter

01 February 1941
Comments Letters S I R S , -- I t has long been known t h a t there is a remarkable relation between t h e Short-eared Owl (Asio flammeus) and the common field-vole (Microtus agrestis). The common vole at apparently regular intervals increases in numbers in different loca...
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Review

01 February 1941
Comments Reviews Ritchie (1940), " An analysis of t h e influence of weather upon a migratory movement of birds," Proc, Roy, Soc, Edin., Vol. 60, P- 299.analysis of t h e d a t a relating t o t h e 1921 invasion of t h e Waxwing (Bombycitta garrulus) and t h e associated...
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