Grey-hooded Flycatcher
Mionectes rufiventris
The grey-hooded flycatcher is 13.5 to 14 cm (5.3 to 5.5 in) long and weighs about 14 g (0.49 oz). The sexes have the same plumage. Adults have a slate gray crown, nape, and face. Their back and rump are dark olive. Their wings and tail are dusky olive. Their chin and throat are pale gray that becomes buffy olive on the lower breast and bright cinnamon-buff on the belly, flanks, and undertail coverts. Both sexes have a dark brown iris, a long dark brownish gray bill with a pale pinkish base to the mandible, and medium brownish gray legs and feet. Voice: The grey-hooded flycatcher's song is a "slightly descending and accelerating, at the end slightly rising and slowing down series of nasal tjew notes".
ID text from Wikipedia, CC BY-SA 4.0
Ochre-bellied Flycatcher
Mionectes oleagineus
The ochre-bellied flycatcher is 12.5 to 14 cm (4.9 to 5.5 in) long and weighs 7.5 to 18.5 g (0.26 to 0.65 oz). The sexes have the same plumage. Adults of the nominate subspecies M. o. oleagineus have a greenish olive head, nape, back, and rump. Their wings are olive with wide buffy ochraceous edges on the tertials and thinner buffy ochraceous edges on the coverts that show as wing bars. Their tail is dark grayish brown or dusky olive. Their throat and underparts are rich cinnamon buff. The other subspecies differ slightly. M. o. Voice: The ochre-bellied flycatcher is mostly silent outside the breeding season. Its song has been described as "a series of sharp chip notes that is followed by a number of louder, more emphatic notes".
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: Grey-hooded Flycatcher and Ochre-bellied Flycatcher.