Not recognized (IUCN 3.1)
| Porphyrio poliocephalus|
Porphyrio porphyrio poliocephalus
Grey-headed swamphen (Porphyrio poliocephalus) is a species of swamphen occurring from the Middle East and the Indian subcontinent to southern China and northern Thailand. It used to be considered a subspecies of the purple swamphen, but was elevated to full species status in 2015; today the purple swamphen is considered a superspecies and each of its six races are designated full species.
The grey-headed swamphen was introduced to North America in the late 1990s due to avicultural escapes in the Pembroke Pines, Florida area. State wildlife biologists attempted to eradicate the birds, but they have multiplied and can now be found in many areas of southern Florida. Ornithological authorities consider it likely that the swamphen will become an established part of Florida's avifauna. It was added to the American Birding Association checklist in February 2013.
- "2015 taxonomy update for Indian birds | eBird India". ebird.org. Retrieved 2015-12-16.
- Ali, Salim; JC Daniel (1983). The book of Indian Birds, Twelfth Centenary edition. New Delhi: Bombay Natural History Society/Oxford University Press.
- Pranty, Bill, Kim Schnitzius, Kevin Schnitzius, and Helen W. Lovell. 2000. Discovery, distribution, and origin of the purple swamphen (Porphyrio porphyrio) in Florida.' Florida Field Naturalist 28: 1–11.
- Floyd, Ted (13 Feb 2013). "#977, Purple Swamphen!". American Birding Association. Retrieved 13 Feb 2013.