Habitat
Almost all open freshwater and brackish habitats; shaded rivulets, muddy puddles in dried-out arroyos, deep turbid rivers, flooded scrub forest, dark pools in evergreen forest, coastal lagoons, coastal lagoons, mangroves, marshes, small rocky watercourses, and choked drainage canals (Fry and Fry 1992). Streams, rivers, lakes, marshes, swamps, mangroves, and rarely rocky seacoasts (AOU 1983). Colombia: fairly common along medium-sized to small streams and edges of lakes and ponds bordered by shrubs and trees; usually not along streams with closed canopy overhead; also mangroves and small numbers along bouldery mountain streams (Hilty and Brown 1986). In Colombia and Bolivia, frequents primarily open habitat along the edges of lakes and streams (Remson 1990). Nests in horizontal burrow dug in bank of stream; entrance usually well hidden and near top of bank.
Reproduction
Known egg laying months include April in Texas and Costa Rica, March and probably January to May in Mexico, November-February in Panama, November in Argentina (Fry and Fry 1992). Clutch size is 3-6 (commonly 5). Incubation, by both sexes (female at night, alternating in daytime), lasts 19-21 days. Young are tended by both parents, leave nest at 22-26 days (also reported as 27 days), independent after additional 4 weeks.