Pale-bellied tapaculo

Taxonomy and systematics

The pale-bellied tapaculo has three recognized subspecies, the nominate Scytalopus griseicollis griseicollis, S. griseicollis gilesi, and * S. griseicollis morenoi*. Pale-bellied tapaculo was formerly considered a subspecies of Magellanic tapaculo (S. magellanicus). The putative Scytalopus infasciatus has been variously proposed as a subspecies of pale-bellied or brown-rumped (S. latebricola) tapaculos, as a synonym for Merida tapaculo (S. meridanus), and as a species in its own right ("Cundinamarca tapaculo"). As of 2021, it is considered "inseparable from the nominate" pale-bellied.

Description

The pale-bellied tapaculo is 10 to long. The nominate subspecies weighs 16.6 to. One male S. g. morenoi weighed 17 g and two male S. g. gilesi 17.5 and. 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.

Distribution and habitat

The pale-bellied tapaculo inhabits the Eastern Andes of Colombia. The nominate is found in Cundinamarca and Boyacá Departments. S. g. gilesi is found in Santander Department, northeast of the nominate. S. g. morenoi is found in northern Santander Department, Norte de Santander Department, and slightly into adjacent Venezuela. It inhabits low scrub in elfin forest and páramo at elevations of 2000 to. It is also, but rarely, found in montane and oak forest. Locally it can be found in Chusquea bamboo stands, and it appears to tolerate disturbed and fragmented habitat.

Behavior

Feeding

The pale-bellied tapaculo is assumed to be insectivorous but few details of its diet or foraging phenology are known.

Breeding

The pale-bellied tapaculo's breeding phenology is also very poorly known. An adult S. g. morenoi was in breeding condition when collected in August and fledglings of that subspecies were collected in April, June, and September. Fledglings of S. g. gelesi were collected between June and December.

Vocalization

The songs of pale-bellied tapaculo subspecies differ somewhat, but all are a trill, sometimes preceded by a single note https://www.xeno-canto.org/586677. The scold call is also a trill https://www.xeno-canto.org/328054.

Status

The IUCN has assessed the pale-bellied tapaculo as being of Least Concern. However, S. g. gelesi has a limited range and the habitat of S. g. morenoi is very badly fragmented and degraded.

References

References

1. BirdLife International. (2016). "''Scytalopus griseicollis''".
2. (January 2021). "IOC World Bird List (v 11.1)".
3. Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 19 January 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved January 19, 2021
4. The last of these was not described until 2015.Avendaño, J.E. and Donegan, T.M. (2015). A distinctive new subspecies of ''Scytalopus griseicollis'' (Aves, Passeriformes, Rhinocryptidae) from the northern Eastern Cordillera of Colombia and Venezuela. ZooKeys 506: 137–153
5. Krabbe, N., T. S. Schulenberg, and G. M. Kirwan (2020). Pale-bellied Tapaculo (''Scytalopus griseicollis''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.mattap1.01 retrieved April 30, 2021