Buff-winged Cinclodes
Cinclodes fuscus
The buff-winged cinclodes is 15 to 19.4 cm (5.9 to 7.6 in) long and weighs 29 to 33 g (1.0 to 1.2 oz). It is a small cinclodes with a shortish bill. The sexes have the same plumage. Adults have a distinct light buffish white supercilium, dark gray-brown ear coverts with pale streaks, and a bright white malar area that flares to the rear. Their forehead is speckled, their crown dark gray-brown, and their upperparts dark brown. Their wing coverts are dark brown with wide buffish edges and their flight feathers dark fuscous with a narrow tawny-rufous band across them. Voice: The buff-winged cinclodes' song is "a short, fast, dry trill, 't-r-r-r-r-r-r-r-r-r-t', lasting c. 2 seconds, often introduced by call notes", and can be sung from the ground, from a rock, and in flight. Its calls include "a sharp 'pfip'... series of high-pitched tinkling notes a sharp whistled 'tsip' ".
ID text from Wikipedia, CC BY-SA 4.0
Dark-bellied Cinclodes
Cinclodes patagonicus
The dark-bellied cinclodes is 18 to 20 cm (7.1 to 7.9 in) long and weighs about 36 to 50 g (1.3 to 1.8 oz). It is a largish cinclodes with a long decurved bill. The sexes have the same plumages, and the two subspecies differ very little. Adults of the nominate subspecies have a white supercilium that begins at the forehead, dark brown lores and ear coverts, and a white malar area with some faint darker flecks. Their crown and nape are dark brown and their upperparts a slightly lighter brown. Their wings are dark brown with blackish brown primary coverts. Voice: The dark-bellied cinclodes is very vocal during the breeding season. Its song is "a piercing weep weep weep tirrrrRRRrr", sung during the male's display and sometimes in a duet by the pair. Its call is a "short, sharp, and stuttering disyllabic ch'tp lasting from 2 to several (>15) notes".
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: Buff-winged Cinclodes and Dark-bellied Cinclodes.