The Buff-necked Ibis (Theristicus caudatus), also known as White-throated Ibis, is found throughout the woodlands, marshes, savanna, lakes and open forests of eastern regions of South America, from Colombia to Uruguay and northern Argentina.
The Buff-necked Ibis is about 30 inches long, has a buff neck, black bill, gray upperparts plumage, reddish legs, wings white with black below. Both sexes are similar.
Its diet consists mainly of insects, spiders, frogs, reptiles, snails, invertebrates and small mammals found in soft soils. The female usually lays between two to four eggs in a platform nest on trees, made from twigs and branches.