Grey-crowned Yellowthroat
Geothlypis poliocephala
The grey-crowned yellowthroat is about 14 cm (5.5 in) long and weighs about 13 to 16 g (0.46 to 0.56 oz). The species is sexually dimorphic. It has a long graduated tail and a stout bill with a visibly curved culmen. Adult males of the nominate subspecies G. p. poliocephala have a mostly olive-gray head with a gray crown, black lores, and white crescents above and below the eye. Their nape, upperparts, wings, and tail are grayish olive-brown. Their throat, breast, and undertail coverts are yellow, their flanks washed with buff, and their belly yellowish white. Voice: The grey-crowned yellowthroat's range-wide song is "a long rich series of varied and jumbled musical phrases". It also has some regional second songs, in Mexico "a series of rich rising and falling whistles" and in Costa Rica "a series of rapidly delivered clear whistled notes accelerating into descending trill".
ID text from Wikipedia, CC BY-SA 4.0
Southern Yellowthroat
Geothlypis velata
The southern yellowthroat is 13 to 14.3 cm (5.1 to 5.6 in) long and weighs 11 to 17 g (0.39 to 0.60 oz). The species is sexually dimorphic. Adult males have a wide black mask from their forehead and forecrown around the eye and including the ear coverts. They have a pale slate-gray crown. Their nape, upperparts, and tail are yellowish green to olive green. The upper surface of their flight feathers is yellowish green to olive green with dark brown inner webs; the lower surface is brown. Their throat and underparts are bright yellow with a very light olive wash on the flanks. Voice: The southern yellowthroat's song has been described as high and sweet, starting with two slow introductory notes followed by two short, lilting, notes, and "ending in a distinct flourish". It is written as "swee swee feedeweet-feedeweet-wu-wutweet or variations thereof".
ID text from Wikipedia, CC BY-SA 4.0
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Grey-crowned Yellowthroat and Southern Yellowthroat.