moustached flowerpiercer Diglossa mystacalis

Unmistakable black flowerpiercer with a bold white mustache and a reddish vent. Some subspecies have a variable red and white chest patch. Sexes similar. Resembles a tanager with a slender hooked bill, and tends to hold its body horizontal as it forages in low shrubs in humid habitats around and above the treeline. Its song is a rapid, jumbled series of high whistles.