Ochre-lored Flatbill
Tolmomyias flaviventris
The ochre-lored flatbill is about 12 to 13 cm (4.7 to 5.1 in) long and weighs 9 to 17.5 g (0.32 to 0.62 oz). The sexes have the same plumage. Adults of the nominate subspecies have a yellowish olive head with a brighter ochre-tinged stripe above the lores and a brighter ochre-tinged eye-ring. Their back, rump, and uppertail coverts are yellowish olive. Their wings are dusky with yellowish edges on the coverts and remiges that appear as two wing bars. Their tail is dusky. Their underparts are bright yellow with an olive to ochre wash on the throat and breast and lightly on the belly. Voice: The ochre-lored flatbill sings "3-5 rather loud, penetrating whistles, sweeEP!....sweeEP!.....sweeEP!, with pauses of 1-several sec between notes". Its call is "a single sweeEP!". It also makes a "mid-high, short fddddddddfit rattle". It usually sings from a well-hidden perch in the forest canopy, and usually around dawn.
ID text from Wikipedia, CC BY-SA 4.0
Yellow-margined Flatbill
Tolmomyias assimilis
The yellow-margined flatbill is 13 to 13.5 cm (5.1 to 5.3 in) long and weighs 12 to 17.5 g (0.42 to 0.62 oz). The sexes have the same plumage. Adults of the nominate subspecies T. a. assimilis have a mostly olive-tinged gray head with a thin white broken eye-ring. Their back, rump, and uppertail coverts are olive-green. Their wings are dusky with yellow edges on the greater coverts and remiges that appear as a pale speculum and a faint wing bar on the closed wing. Their tail is dusky. Their throat is pale gray, their breast and flanks pale olive, and their belly pale yellow. Voice: The yellow-margined flatbill's vocalizations vary geographically. In the Guianas it makes a "series of typically 2‒5 drawn-out extremely nasal, almost screaming notes". In Ecuador it sings "a leisurely series of 3 whistled notes, each slightly higher-pitched and shriller, e.g. weeeuw...weeeu...weee?
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: Ochre-lored Flatbill and Yellow-margined Flatbill.