Tiny bird with a strong bill and short tail. Males are glossy blue-black on the head, back, and throat with a bright yellow forehead and belly, and a white undertail. Females are olive-green above with either a yellowish or white belly flanked by yellow depending on region. Found commonly in a variety of habitats from humid forests to mangroves and from agricultural areas to gardens. Often accompanies mixed-species flocks. The most frequently heard vocalization is the “teee-deee” call.