Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae).
Most species are placed in the genus Gallinula, Latin for "little hen or chicken".

1/ Common moorhen (Gallinula chloropus), also known as the waterhen or swamp chicken
The Greek chloropus: Chloris ("Khloris" or from "Khloros"), meaning "greenish-yellow," "pale green," "pale," or "fresh";
pous foot.