Dickschnabel-Buschammer Arremon crassirostris

Medium-sized sparrowlike bird; olive overall with contrasting yellow belly, white mustache line, dark gray face, and rufous cap. Range does not overlap with other similar-looking sparrows and brushfinches. Tends to be quite shy. Usually found in pairs or small family groups, often scratching through leaf litter or low in a tangle around a forested stream. Sexes alike.