Orange-billed Sparrow

The orange-billed sparrow (Arremon aurantiirostris) is a species of bird in the family Passerellidae, the New World sparrows. It is found from Mexico to Peru. == Taxonomy and systematics == The orange-billed sparrow was formally described in 1847 with its current binomial Arremon aurantiirostris. The orange-billed sparrow has these eight subspecies: == Description == The orange-billed sparrow is 14.5 to 16.5 cm (5.7 to 6.5 in) long and weighs about 35 g (1.2 oz). The sexes have the same plumage and all subspecies have the eponymous bright orange bill. Adults of the nominate subspecies A. a. aurantiirostris have a black crown with a gray stripe along its middle and a wide white supercilium on an otherwise black face. Their upperparts are olive-green and their wings and tail a darker olive-green with yellow at the bend of the wing. Their chin has a small black area and their throat is white with a wide black band below it across the upper upper breast. Their flanks and undertail coverts are brownish gray to olive-green and the rest of their underparts grayish white. They have a very dark brown iris and light brown legs and feet. Juveniles have sooty olive upperparts and breast…