Marsh tern
The name marsh tern refers to terns of the genus Chlidonias, which typically breed in freshwater marshes, rather than coastal locations.
Taxonomy
The genus Chlidonias was introduced in 1822 by the French polymath Constantine [Samuel Rafinesque] with Sterna melanops Rafinesque = Sterna surinamensis Johann [Friedrich Gmelin|Gmelin, J.F.] as the type species. The name Chlidonias is from Ancient Greek, "swallow-like", from, "swallow".Species
The genus contains four species:Notice the hesitation in the gender of the epithet of the scientific names, as they are usually masculine, but in the case of the whiskered tern is mostly used as feminine, maybe from the influence of the previous gender used, Sterna.
The black-bellied tern and the white-cheeked tern might also be placed in Chlidonias.