Rufous-bellied Euphonia

The rufous-bellied euphonia (Euphonia rufiventris) is a species of bird in the family Fringillidae, the finches and euphonias. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela. == Taxonomy and systematics == The rufous-bellied euphonia was formally described in 1819 with the binomial Tanagra rufiventris. The species was eventually reassigned to genus Euphonia. At the time, the genus Euphonia was a member of the family Thraupidae, the "true" tanagers. Multiple studies in the late twentieth and early twenty-first centuries resulted in Euphonia being reassigned to its present place in the family Fringillidae. The rufous-bellied euphonia's further taxonomy is unsettled. The IOC, AviList, and BirdLife International's Handbook of the Birds of the World assign it two subspecies, the nominate E. r. rufiventris (Vieillot, 1819) and E. r. carnegiei (Dickerman, 1988). However, as of late 2025, the Clements taxonomy does not recognize E. r. carnegiei and so treats the species as monotypic. This article follows the two-subspecies model. == Description == The rufous-bellied euphonia is about 10 cm (3.9 in) long and weighs 13 to 18 g (0.46 to 0.63 oz). It is a smallish euphonia with a stout bill. The species is sexually dimorphic. Adult males of the nominate…