Black-throated Grey Warbler
Setophaga nigrescens
The black-throated gray warbler has mostly black, gray, and white plumage, which is soft, lacking gloss. With its striping and the small yellow spot between its eye and bill, it is a distinctive bird. The sexes differ slightly, both having gray upperparts with black streaks, and white underparts with black streaks on the flanks. The adult male is striped with black on the crown, throat, and below the eye, and has white around its chin and above its eye. The adult female has more dingy plumage on its head, with a white throat and dark gray cheeks.
ID text from Wikipedia, CC BY-SA 4.0
Tropical Parula
Setophaga pitiayumi
The tropical parula is about 11 cm (4.3 in) long and weighs 6.5 to 8.0 g (0.23 to 0.28 oz). Adult males of subspecies S. p. nigrilora have a mostly blue-gray head with black lores and a small black mask. Their upperparts are also mostly blue-gray with an olive mantle. Their wings are blue-gray with white tips on the greater and median coverts that show as two wing bars. Their tail is blue-gray with large white spots near the ends of the feathers. Their throat and underparts to the belly are yellow with a strong orange wash on the lower throat, upper breast, and flanks. Voice: Male tropical parulas sing; apparently females do not. In the northern subspecies they have two general song types, a "repeated series of relatively simple syllables, increasing in tempo and pitch, forming rising trill that usually ends with buzzy downslur" and "several simple and complex syllables arranged according to no readily discernible syntax".
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: Black-throated Grey Warbler and Tropical Parula.