Snowy-throated Kingbird
Tyrannus niveigularis
The snowy-throated kingbird is 18.5 to 19 cm (7.3 to 7.5 in) long; one male weighed 34.4 g (1.2 oz). The sexes have the same plumage. Adults have a gray crown and nape with a partially hidden yellow patch in the center of the crown. They have a thin black band on the forecrown and lores that widens into a mask to the ear coverts. Their upperparts are mostly pale gray with more olive on the lower back and rump. Their wings are dusky with whitish edges on the coverts and secondaries. Their tail is blackish with a square tip. Voice: The snowy-throated kingbird's dawn song is "a fast and jumbled ki-ki-ki-kr-reé-it!" and its call "a sharp kip! that can be extended into a kip! kr-r-r-ee-ee-ee".
ID text from Wikipedia, CC BY-SA 4.0
White-throated Kingbird
Tyrannus albogularis
The white-throated kingbird is 20 to 21 cm (7.9 to 8.3 in) long and weighs 35 to 38 g (1.2 to 1.3 oz). The sexes have the same plumage. Adults have a mostly pale gray head with a partially hidden pale orange or yellowish patch in the center of the crown. They have a dusky band from the lores to the ear coverts that forms a "mask". Their upperparts are mostly bright olive green. Their wings are dull blackish brown with pale edges on the coverts and secondaries. Their tail is black and notched. Voice: The white-throated kingbird is not very vocal. Its typical call is "a shrill, trilled tic tic tic'i'i'i'i'i'i'i'i'i'i'i". It also occasionally makes a "long and irregular series of tic notes and trills" that may continue for several minutes.
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: Snowy-throated Kingbird and White-throated Kingbird.