The southern limit of the nesting range of the American Bittern (Botaurus lentiginosus) is generally considered to be along the southern tier of states of the United States (American Ornithologists’ Union, Check-list of North American Birds, 5th ed., 1957; Palmer, Handbook of North American Birds, Vol. 1, Yale Univ. Press, 1962). Although the species is known to winter in suitable localities throughout Mexico, it has not been reported nesting in that country (Friedmann, Griscom and Moore, Pacific Coast Avifauna no. 29, 1950).