Swamp Hen - Porphyrio porphyrio melanotusby Chris' Landscape Images & Designs
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There are 13 or more subspecies of the Purple Swamphen (depending on the authority) which differ mainly in plumage colour. The subspecies groups are: P. p. porphyrio in the Mediterranean, P. p. madagascariensis in Africa, P. p. poliocephalus in tropical Asia, P. p. melanotus in much of Australasia, P. p. indicus in Indonesia and P. p. pulverulentis in the Philippines. European birds are overall purple-blue, African and south Asian birds have a green back, and Australasian and Indonesian birds have black backs and heads.
*Courtesy of Wikipedia