Grey-headed Swamphen, Purple Gallinule, Porphyrio porphyrio
15 different races of Porphyrio porphyrio are recognised across the world. The grey-headed form poliocephalus occurs in Tropical Asia. Some authorities have given this form specie s status, however I have kept to the views of Clements (2011) and kept it as a race of Purple Gallinule. This bird was nest building on Chiang Saen Lake, North-eastern Thailand in late February 2012.