About Passerina rositae (Lawrence, 1874)
The rose-bellied bunting, scientifically named Passerina rositae (Lawrence, 1874), measures 13.5 to 14.5 cm (5.3 to 5.7 in) in length and weighs 19.5 to 20.5 g (0.69 to 0.72 oz). For adult males, the crown is purplish-blue, while the rest of the upperparts are electric blue that fades from darker to lighter towards the tail. Adult males have a grayish chin, blue throat and chest, and salmon pink belly and vent area. For adult females, the head and upperparts are gray-brown, with a bluish tinge on the rump. Adult females have pinkish buff undersides that are warmer on the throat and grow paler towards the lower belly. The core range of the rose-bellied bunting is a narrow strip along the Pacific slope of the Isthmus of Tehuantepec, located in eastern Oaxaca and western Chiapas. There is one additional recorded sighting of the species further east in Chiapas, in El Triunfo Biosphere Reserve. This bird inhabits arid to semiarid thorn forest, moister gallery forest, and swamp forest, and occurs at elevations between 180 and 800 m (590 to 2,620 ft).
