Chopí Blackbird

The chopi blackbird is 25 cm (9.8 in) in length and has black plumage across the body. It is similar to the Forbes's blackbird but has a slightly curved bill with a groove along the lower mandible. The call is a loud explosive "tjouw", either given as a single call or as a series that vary randomly in pitch.

The Chopi blackbird is found from the extreme sout east of Peru in Madre de Dios east through the lowlands of northern and eastern Bolivia, Paraguay, Brazil south of the Amazon, Uruguay and northern and eastern Argentina.

The chopi blackbird is a gregarious species and is typically noted in flocks, which may reach large sizes. They roost in large aggregations in dense foliage and cane brakes. These flocks are highly vocal, the birds singing as if holding conversations, even in flight. When nesting they will aggressively defend the nest site from predators, unhestitatngly chasing hawks and caracaras. It is a semi-colonial species, nesting in cavities, nests stites include old woodpecker holes, hollow trees, cavities in fence posts disuesed rufous hornero nests, within the nests of jabiru storks, the dense foliage of Auracaria angustifolia, holes in banks and termite nests, and under the eaves and older parts of houses. When not nesting in a cavity the Chjopi black bird builds an open cup nest among the dnese foliage of palms and other trees. The clutch size is 4 or 5 eggs, the chopi blackbird is a host for the shiny cowbird and screaming cowbird.

== References ==

The chopi blackbird's common name and its specific name, chopi, are onomatopoeic, being derived from its common vocalisation which is sometimes writtens as "chop-ee".