Porzana

Porzana is a genus of birds in the crake and rail family, (Rallidae). It unites the typical "crakes" found essentially anywhere in the world except desert and polar regions. This genus contains 13 living species, and 4–5 recently extinct ones. In addition, a large number of prehistorically extinct species known only from fossil or subfossil remains have been discovered. Two species are sometimes separated in Poliolimnas as they appear to share some apomorphies. As they are widely allopatric, their similarities may just as well be convergent evolution, and here they are retained in Porzana for the time being.