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
Yellow-bellied Flycatcher
Empidonax flaviventris
Adults have greenish upperparts and yellowish underparts (especially on the throat), with a dusky wash on the chest. They have a white or yellow eye ring that lacks the teardrop projection of the western flycatcher, white or yellowish wing bars that contrast strongly against the black wings, a broad, flat bill, and a relatively short tail when compared to other members of the genus. The upper mandible of the bill is dark, while the lower mandible is orange-pink.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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