Black-faced Antthrush
Formicarius analis
The black-faced antthrush is 15 to 19 cm (5.9 to 7.5 in) long and weighs about 50 to 75 g (1.8 to 2.6 oz). The sexes have the same plumage. Adults of the nominate subspecies F. a. analis have a dusky brown crown. They have a small white spot on their lores and bare bluish skin around their eye. Their face from their bill to their eye is black that extends down to include the chin and throat. The rest of their face, their nape, back, and rump are brown. Voice: The three subspecies of the black-faced antthrush's hoffmanni group sing "an emphatic flat-pitched introductory whistle at ca. 2.0 kHz, followed by a slow series of 1–4 similar but slightly lower-pitched whistles (the latter maintaining about the same pitch).
ID text from Wikipedia, CC BY-SA 4.0
Rufous-capped Antthrush
Formicarius colma
The Formicarius colma is generally a small bird, averaging around 18 cm with males weighing between 38 and 49 grams and females between 41 and 49 grams. Males are marked by a black forehead, rufous-colored (red-brown) crown and nape, with the crown including a variable amount of black feathers. Its back, rump, and wings are olive-brown color with a dusky brown tail and black on the neck, throat, and sides of the head. The upper breast is a dark black that merges into a dark gray on the lower breast while the belly and flanks are a paler gray with (occasionally) a brown wash.
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: Black-faced Antthrush and Rufous-capped Antthrush.