The Guira Cuckoo (Guira guira) is a social, non-parasitic cuckoo found widely in open and semi-open habitats of eastern and southern Brazil, Uruguay, Paraguay, Bolivia, and north-eastern Argentina. It is monotypic within the genus Guira, and is related to the anis.

It has whitish-buff underparts and rump, dark brownish upperparts, a broadly white-tipped dark tail that is relatively long, an orange-rufous crest, bare yellow ocular-skin (commonly fades in captivity), and a relatively heavy, orange-yellow bill. It is generally rather shaggy-looking and has a total length of approximately 34 cm (13 in). Like other members of the subfamily Crotophaginae, the Guira Cuckoo gives off a strong, pungent odour.

The nest is built on a tree fork 2 to 5 m (7–16 ft) from the ground. The eggs (from 5 to 7) are dark green and covered with a chalky layer. They are incubated either in individual or community nests; in the latter one can find up to 20 eggs. Under community nests there are many broken eggs. The competition between young being great, mortality is significant.