Green-tailed Towhee

The green-tailed towhee (Pipilo chlorurus) is a species of bird in the family Passerellidae, the New World sparrows. It is found in the western United States and much of Mexico. == Taxonomy and systematics == The formal description of the green-tailed towhee is credited to Audubon, lthough the bird's description was written by John Townsend in a letter to him. Audubon gave this bird the binomial Fringilla chlorura and the English name "green-tailed sparrow". Because the species' wing shape and some other characteristics are somewhat distinctive, various authors placed it genera Oreospiza, Chlorura, or Oberholseria before it settled into its current Pipilo. The genus (Pipilo) of the green-tailed towhee is monotypic. == Description == The green-tailed towhee is about 18 cm (7.1 in) long and weighs on average about 29 g (1.0 oz). Though the sexes have essentially the same plumage, females tend to be slightly duller than males. Adults have a reddish brown crown, a white spot above the lores, and a white "moustache" and throat on an otherwise gray head. Their hindneck, back, and scapulars are yellowish olive with grayish olive edges on the feathers. Their rump and uppertail coverts are grayish olive. Their tail is mostly greenish…