American Grey Flycatcher
Empidonax wrightii
American gray flycatchers are small birds, but larger than most Empidonax flycatchers. A typical adult measures 15 cm (5.9 in) in length, 22 cm (8.7 in) in wingspan, and 12.5 g (0.44 oz) in mass. Adults have pale gray upperparts, darker on the wings and tail, with a faint olive tinge after molting in fall. Underparts are whitish, but washed slightly with yellow in fresh plumage. They have white wing bars and an inconspicuous white eye ring. There is a pale supraloral band stretching above the base of the bill.
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: American Grey Flycatcher and Yellowish Flycatcher.