Atuen antpitta

Atuen antpitta
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Grallariidae
Genus:	Grallaria
Species:	G. atuensis
Binomial name
Grallaria atuensis Carriker, 1933
Range in Peru

The Atuen antpitta, or southern tawny antpitta, (Grallaria atuensis) is a species of bird in the family Grallariidae. It is endemic to Peru. ^[2]

Taxonomy and systematics

The Atuen antpitta was formerly considered to be a subspecies of the tawny antpitta (Grallaria quitensis). A 2003 publication suggested that it might be a full species. ^[3] In 2016 BirdLife International's Handbook of the Birds of the World (HBW) recognized it as a separate species, the southern tawny antpitta. ^[4] The International Ornithological Committee (IOC) recognized it in July 2023 with the name Atuen antpitta. ^[5] The Clements taxonomy recognized the new species with that name in October 2023 and HBW adopted the IOC name in December 2023. ^{[6] [7]} However, as of July 2024 the South American Classification Committee of the American Ornithological Society had not recognized the split, though it did acknowledge the 2003 publication's suggestion. ^[8]

Description

The Atuen antpitta is about 18 cm (7.1 in) long and apparently weighs between 58 and 65 g (2.0 and 2.3 oz). The sexes have the same plumage. Adults have deep cinnamon-rufous lores, eyering, and spot behind the eye. Their ear coverts are deep cinnamon-rufous with black tips that make them look sooty. They have mostly brown to dusky olive-brown crown, nape, back, wings, and tail. Their throat is cinnamon-ochraceous. Their underparts are mostly dark olive-ochraceous that is darkest on the breast. Their breast and belly feathers have small white tips that give a scaled appearance. Their flanks are buffy olive-brown. They have a chestnut brown iris, a black to blackish gray bill, and brownish gray legs and feet. ^{[9] [10]}

Distribution and habitat

The Atuen antpitta is found on the spine of Peru's Andes in southern Amazonas, eastern La Libertad, and San Martín departments. It primarily inhabits the páramo and nearby montane forest. In elevation it mostly occurs between 2,850 and 3,500 m (9,400 and 11,500 ft). ^{[9] [10]}

Behavior

Movement

The Atuen antpitta is believed to be a year-round resident throughout its range. ^[9]

Feeding

The Atuen antpitta's diet is not well documented but it is assumed to feed on a variety of insects and other invertebrates. It usually forages by itself, on the ground, hopping and pausing to flick aside leave litter, to probe mosses and the ground, and to glean from vegetation. ^[9]

Breeding

The Atuen antpitta's breeding season apparently includes September. Nothing else is known about the species' breeding biology. Its nest, eggs, and breeding behavior are assumed to be similar to those of its former parent tawny antpitta, which see here. ^[9]

Songs and calls Listen to the Atuen antpitta in the tawny antpitta page on xeno-canto

Vocalization

Despite its generally open habitat, the Atuen antpitta is more often heard than seen. Its vocalization was the principal reason it was recognized as a species. ^[9] Its song is a hollow whistle, "WHEEP tu-TUEE?". Its call is "a harsh, rolling screech: TCHEE'ew". ^[10] The species is heard most often around dawn but vocalizes at any time of day. It vocalizes from the ground or a prominent perch. ^[9]

Status

The IUCN has assessed the Atuen antpitta as being of Least Concern. It has a small range; its population size is not known and is believed to be stable. No immediate threats have been identified. ^[1] It is considered fairly common. ^[10] It occurs in at least two protected areas. "Nevertheless, Atuen Antpitta's páramo habitat is increasingly threatened, and populations are undoubtedly facing ongoing and ever-increasing pressure from habitat fragmentation and destruction." ^[9]

References

1. BirdLife International. (2017) [amended version of 2016 assessment]. "Atuen Antpitta Grallaria atuensis". IUCN Red List of Threatened Species . 2017: e.T103660431A112315904. doi: 10.2305/IUCN.UK.2017-1.RLTS.T103660431A112315904.en . Retrieved 17 September 2024.
2. Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2024). "Antthrushes, antpittas, gnateaters, tapaculos, crescentchests". IOC World Bird List. v 14.2. Retrieved 19 August 2024.
3. Krabbe, N., and T.S. Schulenberg. 2003. Family Formicariidae (Ground-antbirds). Pp. 682–731 in “Handbook of the Birds of the World, Vol. 8. Broadbills to tapaculos." (J. del Hoyo, A. Elliot, and D. A. Christie). Lynx Edicions, Barcelona.
4. BirdLife International (2016) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 9. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/BirdLife_Checklist_Version_90.zip [.xls zipped 1 MB].
5. Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2023). "Antthrushes, antpittas, gnateaters, tapaculos, crescentchests". IOC World Bird List Version 13.2. International Ornithologists' Union. Retrieved September 17, 2024.
6. Clements, J. F., P.C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of birds of the world: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved October 28, 2023
7. HBW and BirdLife International (2023). Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 8. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v8_Dec23.zip retrieved January 5, 2024
8. Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 27 July 2024. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved July 28, 2024
9. Greeney, H. F. and A. J. Spencer (2023). Atuen Antpitta (Grallaria atuensis), version 1.0. In Birds of the World (N. D. Sly, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.tawant4.01 retrieved September 17, 2024
10. Schulenberg, T.S., D.F. Stotz, D.F. Lane, J.P. O’Neill, and T.A. Parker III. 2010. Birds of Peru. Revised and updated edition. Princeton University Press, Princeton, New Jersey. Plate 178