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Hornets (Vespa orientalis) attacking a freshly skinned carcass of a laughing dove (Steptopelia senegalensis) (Left) while ignoring that of a pied kingfisher (Ceryle rudis). This observation prompted H. B. Cott (4) to undertake an extensive investigation of avian chemical defense. [Reproduced with permission from ref. 4 (Copyright 1947, The Zoological Society of London).]
