Каштановобрюхая эуфония Euphonia pectoralis

Tiny bird with a strong bill. Males are glossed metallic dark blue with a chestnut belly and yellow shoulder. Females are mostly olive-green with a gray crown, throat, and central belly. Note the chestnut vent. Found in the canopy of humid forests and forest borders; often accompanying mixed-species flocks. The call is a series of rattling notes.