Nutting's Flycatcher
Myiarchus nuttingi
Nutting's flycatcher is 18 to 19 cm (7.1 to 7.5 in) long and weighs about 21 to 24 g (0.74 to 0.85 oz). The sexes have the same plumage. Adults of the nominate subspecies have a drab gray-brown crown that has a slight crest. Their face is otherwise a paler gray. Their upperparts are mostly drab gray-brown with a rufescent tinge on the uppertail coverts. Their wings are browner than the upperparts with rufous outer edges on the primaries and grayish white outer edges on the secondaries and tertials. The wing's greater and median coverts have pale tips that show as two wing bars. Voice: The primary call of Nutting's flycatcher is "a low whistle that rises initially and then descends, wEEeeeuuu". Other calls include a "shorter wEEeuup...a whistled whinny...agitated nasal calls, pee'up! or wi'wi'uh!, and a scratchy rrheeaa".
ID text from Wikipedia, CC BY-SA 4.0

Panama Flycatcher
Myiarchus panamensis
The Panama flycatcher is 19 to 20 cm (7.5 to 7.9 in) long and weighs about 28 to 38.5 g (0.99 to 1.4 oz). The sexes have the same plumage. Adults of the nominate subspecies have a grayish olive crown and upperparts. The crown has a slight crest and is slightly darker in the center, giving a streaked effect. Their face is otherwise gray. Their wings are mostly grayish olive with pale whitish yellow outer webs on the tertials. Their tail is brown with slightly paler outer vanes on the outermost pair of feathers. Voice: The Panama flycatcher's dawn song is "isolated, short, slowly modulated whistles given every 2–3 seconds"; during the day it makes the same song with longer intervals between the whistles. Its calls are "epeated hiccups (normally disyllabic), rasping whistles and rolls in response to intruding conspecifics". In Costa Rica it "histles a clear wheer...
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: Nutting's Flycatcher and Panama Flycatcher.