Brown-rumped foliage-gleaner

Brown-rumped foliage-gleaner
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Furnariidae
Genus:	Automolus
Species:	A. melanopezus
Binomial name
Automolus melanopezus (Sclater, PL, 1858)

The brown-rumped foliage-gleaner (Automolus melanopezus) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. ^[2] It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru. ^[3]

Taxonomy and systematics

The brown-rumped foliage-gleaner and the chestnut-crowned foliage-gleaner (A. rufipileatus) are sister species. ^{[4] [5]} The brown-rumped is monotypic. ^[2]

Description

The brown-rumped foliage-gleaner is 16 to 19 cm (6.3 to 7.5 in) long and weighs 27 to 32 g (0.95 to 1.1 oz). It is one of the smaller members of its genus and has a shortish and heavy bill. The sexes have the same plumage. Adults have a mostly rich dark brown face with a few buff streaks on the ear coverts, grizzled brownish and grayish lores, and an ochraceous malar area. Their crown is rich brown with some faint pale spots on the forehead. Their back and rump are rich brown that blends to chestnut-tinged brown uppertail coverts. Their wing has dull ochraceous at the bend, dark reddish brown coverts, and somewhat more rufescent flight feathers. Their tail is dull reddish brown. Their throat is dull tawny-buff that becomes light brown on the breast and belly. Their sides and flanks are darker brown and their undertail coverts pale rufescent brown. Their iris is dark red to orange, their maxilla dark grayish to blackish, their mandible pale gray to grayish brown, and their legs and feet olive-gray to greenish gray. Juveniles have thin dark edges on their crown feathers and a paler throat and darker and browner underparts than adults. ^{[6] [7] [8]}

Distribution and habitat

The brown-rumped foliage-gleaner has a disjunct distribution in the western Amazon Basin. One population is found around where southwestern Colombia, eastern Ecuador, and northern Peru meet. The other is found in a band in southeastern Peru, northern Bolivia, and west-central Brazil. Despite this separation, the populations are essentially phenotypically identical. The species inhabits tropical evergreen forest, usually on floodplains (both várzea and terra firme ), and almost always in or near thickets of Guadua bamboo. In elevation it mostly ranges between 300 and 500 m (1,000 and 1,600 ft) and locally occurs up to 600 m (2,000 ft). ^{[6] [7] [8] [9]}

Behavior

Movement

The brown-rumped foliage-gleaner is a year-round resident throughout its range. ^[6]

Feeding

The brown-rumped foliage-gleaner feeds mostly on a variety of insects and spiders; small tree frogs have also been recorded in its diet. It regularly joins mixed-species feeding flocks. It forages from the forest's undergrowth to its lower mid-storey, acrobatically gleaning and pulling prey from debris and clumps of dead leaves. ^{[6] [7] [9]}

Breeding

Nothing is known about the brown-rumped foliage-gleaner's breeding biology. ^[6]

Songs and calls Listen to brown-rumped foliage-gleaner on xeno-canto

Vocalization

The brown-rumped foliage-gleaner's song is "a fast, rhythmic 'whip, whip, whudidididit-wrrrrrr', or staccato burst of upward-inflected notes, 'whe-de-de-de-de-de-de', slightly descending at [the] end". ^[6]

Status

The IUCN has assessed the brown-rumped foliage-gleaner as being of Least Concern. It has a fairly large range, but its population size is not known and is believed to be decreasing. No immediate threats have been identified. ^[1] It is considered rare to uncommon through its range. It occurs in at least one protected area, Manú National Park. ^[6]

References

1. BirdLife International (2018). "Brown-rumped Foliage-gleaner Automolus melanopezus". IUCN Red List of Threatened Species . 2018: e.T22702938A130279025. doi: 10.2305/IUCN.UK.2018-2.RLTS.T22702938A130279025.en . Retrieved 6 September 2023.
2. Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2023). "Ovenbirds, woodcreepers". IOC World Bird List. v 13.2. Retrieved July 31, 2023.
3. 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 31 May 2023. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved May 31, 2023
4. Chesser, R. T. (2004) Systematics, evolution, and biogeography of the South American ovenbird genus Cinclodes. Auk 121: 752–766.
5. Derryberry, E. P., S. Claramunt, G. Derryberry, R. T. Chesser, J. Cracraft, A. Aleixo, J. Pérez-Emán, J. V. Remsen, Jr., and R. T. Brumfield. (2011). Lineage diversification and morphological evolution in a large-scale continental radiation: the Neotropical ovenbirds and woodcreepers (Aves: Furnariidae). Evolution 65(10):2973–2986. https://doi.org/10.1111/j.1558-5646.2011.01374.x
6. Remsen, Jr., J. V. (2020). Brown-rumped Foliage-gleaner (Automolus melanopezus), 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.brfgle1.01 retrieved September 6, 2023
7. Ridgely, Robert S.; Greenfield, Paul J. (2001). The Birds of Ecuador: Field Guide. Vol. II. Ithaca: Cornell University Press. pp. 370–371. ISBN   978-0-8014-8721-7.
8. van Perlo, Ber (2009). A Field Guide to the Birds of Brazil. New York: Oxford University Press. p. 226. ISBN   978-0-19-530155-7.
9. McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010). Field Guide to the Birds of Colombia. Bogotá: Fundación ProAves. p. 123. ISBN   978-0-9827615-0-2.