The Least Grebe (Tachybaptus domiicus) is found from south Texas to north Argentina. It lives singly or in pairs, in mostly covered-vegetation ponds or near margins of larger bodies of water, on slow-flowing rivers. Its size is of 2 cm (9 inches) in height and 150 g in weight.
Its hindneck and upperparts are blackish-brown. Rest of head and neck are dark grayish. Underparts dusky, mottled or mixed with white. Bill black with grayish to horn-color at tip. This bird eats aquatic insects, crustaceans, small fishes and frogs.