Rufous-capped Spinetail

The rufous-capped spinetail is 13 to 17 cm (5.1 to 6.7 in) long and weighs 12 to 16 g (0.42 to 0.56 oz). The sexes have the same plumage. Adults have a wide buff supercilium and dark brownish gray lores and ear coverts. Their crown and nape are bright orange-rufous and their back, rump, and uppertail coverts are rufescent brown. Their wings are mostly chestnut-brown. Their tail is chestnut; it is graduated and the feathers have pointed tips. Their chin has a tiny tawny spot; the rest of their chin and throat are whitish with faint gray streaks. Voice: The rufous-capped spinetail's song has variously been described as "a fast nasal 'di-di-di-réét' ", "tdrrrWit", and "a quiet, insistent 'drrrrrt wee' ". Its call is "a distinctive low-pitched trill, 'tshrrr' " also described as a "dry rattle, like 'trrrrruh' ".