The Least Bittern (Ixobrychus exilis) ranges from Canada to Peru and North Argentina. It is found in both slopes, principally in lowlands, and in tall grass in freshwater marshes. Its measures are 30 cm (12 inches) in height and 80 g in weight.
Its crown and mantle are glossy black (males) or chestnut (females). Face and underparts mostly buff, and belly white. Its upper mandible is black, and below flesh-color, and its legs are yellow-green. It feeds on small fishes, aquatic insects and frogs.