Buff-breasted Flycatcher
Empidonax fulvifrons
The buff-breasted flycatcher is about 13 cm (5.1 in) long and weighs 6.9 to 9.3 g (0.24 to 0.33 oz). It is the smallest member of genus Empidonax in the US and among the smallest overall. The sexes are alike. Subspecies E. f. pygmaeus is the best known. Adults have dull buffy white lores and a faint dull buffy white eye-ring on an otherwise buffy greenish brown face. Their crown, nape, and upperparts are a darker buffy greenish brown than the face. Their tail is grayish brown with paler grayish white outer webs on the feathers. Voice: The buff-breasted flycatcher's song in Guatemala and Honduras is "a rapid ti'beuu! or pi'dew!" and its call there "a soft, liquid wit". Further north its song is described as chee-lick or chee-lick chou" and its call as "a single pit note".
ID text from Wikipedia, CC BY-SA 4.0
Yellowish Flycatcher
Empidonax flavescens
The yellowish flycatcher is 12.5 to 14 cm (4.9 to 5.5 in) long and weighs 9 to 16 g (0.32 to 0.56 oz). The sexes are alike. Adults of the nominate subspecies have a pale yellow almond-shaped eye-ring on an otherwise yellowish green face. Their crown, nape, and upperparts are olive-green. Their tail is dusky to blackish with yellowish green edges on the feathers. Their remiges are mostly dusky to blackish and glossy. Their primaries have pale olive edges and the secondaries and tertials have pale yellow edges to the outer webs. Voice: The yellowish flycatcher's dawn song is "a series of three high-frequency notes sounds like seee chit seee or seee seee chit seee seee seee". Its calls include a very high "upslurred whistle, seee", a "loud, underslurred, and short note, tseeep", and "a louder tsick or tseet".
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: Buff-breasted Flycatcher and Yellowish Flycatcher.