Porphyrio is the swamphen or swamp hen bird genus in the rail family.

Gruiformes, Gruidae: from the Latin word grus meaning "crane".
Rallidae: from rallus new Latin for rail, an aquatic bird.
The genus name Porphyrio is the Latin name for "swamphen", meaning "purple".

1/ Western swamphen (Xít, Porphyrio porphyrio)

2/ Grey-headed swamphen (Porphyrio poliocephalus) 
or Gray-headed swamp hen