Pale-bellied Tapaculo
Scytalopus griseicollis
The pale-bellied tapaculo is 10 to 11.5 cm (3.9 to 4.5 in) long. The nominate subspecies weighs 16.6 to 19.3 g (0.59 to 0.68 oz). One male S. g. morenoi weighed 17 g (0.60 oz) and two male S. g. gilesi 17.5 and 18 g (0.62 and 0.63 oz). The nominate adult is mostly gray, lighter on the underside. Its back and wings are brownish gray. The rump, flanks, and vent are orange-brown. S. g. gelesi has a darker back with less brown and darker (slate gray) underparts. S. g. morenoi has a brown mantle. Voice: The songs of pale-bellied tapaculo subspecies differ somewhat, but all are a trill, sometimes preceded by a single note . The scold call is also a trill .
ID text from Wikipedia, CC BY-SA 4.0
White-crowned Tapaculo
Scytalopus atratus
The white-crowned tapaculo is 12 cm (4.7 in) long. Males weigh 24.6 to 32.5 g (0.87 to 1.15 oz) and one female weighed 25.3 g (0.89 oz). The male of the nominate subspecies is mostly blackish above and slightly lighter below. The flanks and vent are reddish brown and have black bars. It has a white patch on the crown of the head. The female is paler than the male and washed with brown above and is more reddish on the flanks. The juvenile is rust colored with heavy barring. The male S. a. nigricans is darker than the nominate and the female is gray underneath. The male S. a. Voice: The songs of different populations of white-crowned tapaculos are highly variable. Some examples include this from near Bogotá, Colombia , this from near La Florida, Department of Amazonas, Peru , and this from Mérida, Venezuela .
ID text from Wikipedia, CC BY-SA 4.0

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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Pale-bellied Tapaculo and White-crowned Tapaculo.