Ashy-throated Chlorospingus
Chlorospingus canigularis
The ashy-throated chlorospingus is 13 to 14 cm (5.1 to 5.5 in) long and weighs 14.5 to 21 g (0.51 to 0.74 oz). The sexes have the same plumage. Adults of the nominate subspecies C. c. canigularis have a mostly gray head with slightly darker ear coverts and a grayish white throat. They have a wide light yellow band across the chest that continues with an olive tinge along the sides and flanks. The centers of their breast and belly are whitish to grayish white and their undertail coverts olive-yellow. Voice: In Peru, subspecies C. c. signatus of the ashy-throated chlorospingus sings "an accelerating series of high chipping notes that falls, then rises in pitch". There its call is "a dry, metallic tik, usually given in a stuttered series". In Colombia the species sings "tsuk...tsuk...chit-chit chi’t’t’t’t’t’t’a’a’a’a’i’i’it’it-tit, trill rising slightly, then descending, and rising again at end".
ID text from Wikipedia, CC BY-SA 4.0
Dusky Chlorospingus
Chlorospingus semifuscus
The dusky chlorospingus is 14 to 15 cm (5.5 to 5.9 in) long and weighs 17 to 23 g (0.60 to 0.81 oz). The sexes have the same plumage. Adults of the nominate subspecies have a dark gray crown and face with sometimes a tiny white spot behind the eye. Their nape, upperparts, and tail are dark olive. Their flight feathers are dusky with yellowish olive edges except on the tertials, which are mostly dark olive. Their throat and underparts are mostly brownish gray. Their breast, flanks, and undertail coverts have an olive tinge. Voice: The dusky chlorospingus' song is "a series of almost hummingbird-like, high-pitched notes that gradually speed up and gain strength, becoming quite 'spanking' before ending in a dry sputter". It is most often heard at dawn and sometimes in late afternoon. The species' calls are "an extremely high-pitched chip, often repeated, and a thin penetrating trill".
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: Ashy-throated Chlorospingus and Dusky Chlorospingus.