Green-chinned Euphonia

The green-chinned euphonia or green-throated euphonia (Euphonia chalybea) is a species of bird in the family Fringillidae, the finches and euphonias. It is found in Argentina, Brazil, and Paraguay. == Taxonomy and systematics == The green-chinned euphonia was originally described in 1825 with the binomial Tanagra chalybea. The genus Tanagra (Tangara) is a member of the family Thraupidae, the "true" tanagers, where the species remained after being reassigned to genus Euphonia. 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 green-chinned euphonia is also known as the green-throated euphonia. It is monotypic. == Description == The green-chinned euphonia is about 10 cm (3.9 in) long and weighs 18 to 20 g (0.63 to 0.71 oz). It is a large euphonia with a short thick bill. The species is sexually dimorphic. Adult males have a small bright yellow forehead patch and blackish lores. The rest of their head, their neck, and their upperparts are glossy dark greenish blue. Their flight feathers are mostly dusky with dark greenish blue edges on the secondaries and tertials. Their tail's upper side is dark greenish blue and its underside is…