What is "gnateater"

n. Any of the South American passerine birds in the family Conopophagidae.

The gnateaters are a bird family, Conopophagidae, consisting of ten small passerine species in two genera, which occur in South and Central America. The family was formerly restricted to the gnateater genus Conopophaga; analysis of mtDNA cytochrome b and NADH dehydrogenase subunit 2 sequences (Rice 2005a,b) indicates that the "antpittas" of the genus Pittasoma also belong in this family. The association between this genus and Conopophaga is also supported by traits in their natural history, morphology, and vocalizations (Rice, 2005a). The members of this family are very closely related to the antbirds and less closely to the antpittas and tapaculos. Due to their remote and dim habitat, gnateaters are a little-studied and poorly known family of birds, though they are often sought after by birdwatchers.