Red-headed Tanager

The red-headed tanager (Piranga erythrocephala) is a medium-sized American songbird in the family Cardinalidae, the cardinals or cardinal grosbeaks, endemic to Mexico. Comprising two subspecies, it is around 15 cm (5.9 in) long. Males have predominantly yellow-olive plumage with a red head and throat and females have yellow forecrowns. == Taxonomy and systematics == English naturalist William Swainson described the red-headed tanager in 1827 as Spermagra erythrocephala from material collected by William Bullock and his son from a specimen from Temascaltepec in Mexico. The red-headed tanager and the other species of genus Piranga were originally placed in the family Thraupidae, the "true" tanagers. Since approximately 2008 they have been placed in their current family. It and the white-winged tanager (Piranga leucoptera) have sometimes been placed in genus Spermagra. The red-headed tanager has two recognized subspecies, the nominate Piranga erythrocephala erythrocephala and P. e. candida. == Description == The red-headed tanager is approximately 15 cm (5.9 in) long and weighs 19.9 to 24.5 g (0.70 to 0.86 oz). The nominate male's forecrown, face, throat and upper chest are red and the rest of the upperparts bright yellow-olive. The rest of the underparts are olive-yellow. It has a narrow black mask. The…