Golden-winged Manakin
Masius chrysopterus
The golden-winged manakin is about 11 cm (4.3 in) long and weighs 9.0 to 13.5 g (0.32 to 0.48 oz). The species is sexually dimorphic. Adult males have a bright golden-yellow forecrown of plush feathers that curve forward over the bill and short black plumes on either side of it that project up as "horns". Their plumage otherwise is mostly black with a patch of orange-red on the hindcrown, a patch of golden-yellow on the throat, and entirely yellow primaries, secondaries, and outermost tail feathers. Adult females are mostly olive-green with a yellow-olive throat, belly, and wing linings. Voice: Male golden-winged manakins make a quiet frog-like "nurrt" call when near their display site. During the "log approach" display they make "a long, whistling seeee-tseet-tseet call ending in a rapid nurrt" as it lands. Both sexes make a thin, high-pitched "tseet" call while foraging.
ID text from Wikipedia, CC BY-SA 4.0

White-crowned Manakin
Pseudopipra pipra
The white-crowned manakin is 9–10 cm (3.5–3.9 in) in length. The male of the nominate subspecies has an average weight of 11.0 g (0.39 oz); the female is slightly heavier and on average weighs 12.8 g (0.45 oz). It is a compact short-tailed bird with a stout hooked bill, dark legs, red eyes and striking male plumage. The adult male is mostly black with a white crown which can be erected as a low crest. His call is a buzzy jeeeee, louder and preceded by a popping p-p-p chee when displaying.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Golden-winged Manakin and White-crowned Manakin.