Great Blue and aberrant Grey Herons
I was interested to learn of the two observations of melanistic Grey Herons Ardea cinerea (Brit. Birds 70: 76, 345-346), as well as the one seen in the Camargue, France, by Dr J. G. and Dr P. F. Harrison and described and illustrated as a hybrid Purple A. purpurea x Grey Heron (Bull. Brit. Orn. Club 88: 1-4). When unusually dark herons of Grey Heron size are
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