The Thick-billed Euphonia is a small bird about 11 cm long. Males have a glossy blue back and yellow-orange underparts; females have an olive back and yellow-orange underparts. It feeds on fruit.
It is about 11 cm long. Males have glossy blue upperparts and yellow-orange throat and underparts. Females are olive above and dull yellow-orange below.
It is mainly frugivorous and occurs in varied settings including river-edge, gallery, secondary and dry forest, and lowland forest edges. In Peru it ranges from humid Amazonian forest to scrub in northwestern Tumbes.
An extinction-risk assessment has not been added yet.