The Thick-billed Euphonia (Euphonia laniirostris) is a species of bird in the Thraupidae family. It is found in Bolivia, Brazil, Colombia, Costa Rica, Ecuador, Panama, Peru, and Venezuela. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, and heavily degraded former forest.
BirdLife International 2004. Euphonia laniirostris. 2006 IUCN Red List of Threatened Species. Downloaded on 25 July 2007.