dark-billed cuckoo's nest is a flat platform made of sticks and placed in a tree or bush. In most of its range it lays two or three eggs but in Argentina the clutch is more commonly three to four and occasionally five. The eggs are greenish blue. Incubation begins with the first egg laid so hatching is asynchronous and the young differ in size. Vocalization The dark-billed cuckoo's song is variously described as "six to eight resonant, buzzy kazoo-like notes" and "a ventriloquial ga-ga-ga-go-go." Another vocalization is "a descending series of guttural notes" that may also be a song. It makes "a dry-sounding buzz...dddddrr" call. Status The IUCN has assessed the dark-billed cuckoo as being of Least Concern. It has an extremely large range, and though its population size is not known it is believed to be stable. No immediate threats have been identified. It is considered fairly common throughout its range. References External links Dark-billed Cuckoo photo gallery VIREO Photo-High Res; Article geometer–"Brazil Birds" dark-billed cuckoo Birds of South America Birds of Trinidad and Tobago Birds of the Caribbean dark-billed cuckoo Taxa named by Louis Jean Pierre Vieillot Birds of the Amazon Basin Birds of Brazil Taxonomy articles created by Polbot