Pyriglena leuconota maura
Chapada dos Guimarães, Mato Grosso, Brazil.
Male. At an antswarm that had a remarkable 20+ fire-eyes attending! This species is found in tropical South America, and while males look more or less the same throughout the species's range, the females show a lot of racial variation in plumage. Here is a female that was attending the same antswarm.