Swallow-tailed Cotinga

The swallow-tailed cotinga is about 18 to 20 cm (7.1 to 7.9 in) long and weighs about 43 to 60 g (1.5 to 2.1 oz). The sexes have different plumage though both have the eponymous long divided tail. Adult females have a mottled black and gray forehead, a pale gray to grayish brown crown with a usually concealed dull red streak in the middle. Their nape is blackish with broken white bars. Their upperparts are mostly dull olive with bright yellow forming a scaly appearance; their uppertail coverts are mostly olive-yellow with dark streaks. Voice: The swallow-tailed cotinga is mostly silent. Two known calls are "a high guttural whistle, rendered gut, gut or similar a tremolo". It also makes "a very low, slightly metallic pik note" while foraging.