Slaty Spinetail

The slaty spinetail or slaty castlebuilder, (Synallaxis brachyura), is a passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found from Honduras south to Peru. == Taxonomy and systematics == The slaty spinetail has four subspecies: S. b. nigrifumosa Lawrence, 1865 S. b. griseonucha Chapman, 1923 S. b. brachyura Lafresnaye, 1843 S. b. caucae Chapman, 1914 == Description == The slaty spinetail is 14 to 16 cm (5.5 to 6.3 in) long and weighs 16 to 21 g (0.56 to 0.74 oz). The sexes have the same plumage. Adults of the nominate subspecies S. b. brachyura have a grayish supercilium on an otherwise darker gray face. Their crown and nape are deep rufous-chestnut, their back is dark sooty brown to slate-brown, and their rump and uppertail coverts are slightly browner than the back. Their wing coverts and base of their flight feathers are deep rufous-chestnut and the rest of the flight feathers are dark brown. Their tail is the same brown as the rump and uppertail coverts; it is long and the feathers lack barbs at their tips, giving a spiny appearance. Their throat is blackish, their breast and sides dark sooty brown, their belly a…