01 July 1948
Comments Letters SIRS,---In an article on this subject (antea Vol. xl, pp. 62-4) A. Whitaker cites as examples of abnormality two diving descents by Rooks (Corvus f. frugilegus) and Jackdaws (C, monedula spermologus) from an estimated height of 600-700 feet to a freshly p...
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