Tawny Tit-Spinetail

The tawny tit-spinetail (Sylviorthorhynchus yanacensis) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, and Peru. == Taxonomy and systematics == The tawny tit-spinetail was first placed in genus Leptasthenura but genetic data published in 2011 places it firmly in genus Sylviorthorhynchus. It shares the genus with Des Murs's wiretail (S. desmurii) and together they are sister species. The tawny tit-spinetail is monotypic. However, the Peruvian and Bolivian populations have some plumage differences and there is speculation that they may represent different taxa. == Description == The tawny tit-spinetail is 16 to 17.5 cm (6.3 to 6.9 in) long and weighs 10 to 12 g (0.35 to 0.42 oz). The sexes have the same plumage. Adults have a mostly bright cinnamon buff face with a tawny rufous forehead and a tawny brown crown. The Peruvian poplulation has a narrow buff supercilium while that of Bolivian birds is whitish. Their back is tawny brown and their rump and uppertail coverts are rufous. Their wing coverts are dusky with rufous edges and their flight feathers are dusky brown with much rufous on their outer webs. Their tail is graduated and rufous.…