Data Zone
Justification of Red List category
This species is known from a small number of scattered sites in the Peruvian and Bolivian Yungas. Its population is suspected to be small and declining slowly as a consequence of the loss and degradation of forests within the range. It is therefore assessed as Near Threatened.
Population justification
The species appears to be naturally rare and patchily distributed, and playback surveys in several areas of prime habitat have failed to find it (S. K. Herzog in litt. 1999, 2007; eBird 2022). It has been suggested that the population may number at least 10,000 individuals (J. Tobias in litt. 2003). Tentatively, the population is here placed in the band 2,500-9,999 mature individuals, which roughly equates to 3,750-14,999 individuals, but an accurate recent quantification is urgently required.
Trend justification
The population trend has not been investigated, but declines are suspected on the basis of habitat loss and degradation. Within the range, 2% of tree cover is lost over ten years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Due to the species' strong dependence on mature, undisturbed forests, population declines may considerably exceed the rate of tree cover loss. Tentatively, declines are here placed in the band 1-19% over ten years.
The species is endemic to the Yungas of Bolivia (La Paz and Cochabamba) and immediately adjacent Peru (Puno, Cusco and Madre de Dios).
It is rarely seen, but has been recorded in a fairly high density along the Paucartambo-Shintuya road near Manú National Park in Cusco, Peru (J. Tobias in litt. 2003), as well as at several sites in Bolivia, including Serranía Bellavista and Cerro Asunta Plata, La Paz, and Chapare, Cochabamba (Remsen et al. 1982; S. K. Herzog in litt. 1999, 2007; S. Kreft in litt. 2003, Brumfield and Maillard 2007). The distribution range may however be wider than currently known as the species is easily overlooked.
It inhabits humid, montane cloud forest. Even though individuals were occasionally observed passing though second growth or the canopy of a shade coffee plantation adjacent to undisturbed forest (S. K. Herzog in litt. 1999, 2007; Brumfield and Maillard 2007), the species appears to have a preference for pristine, undisturbed forests and to avoid converted habitats (Lloyd 2020). It is often found in pairs and as part of mixed-species flocks (Lloyd 2020). Breeding appears to coincide with the rainy season and begins in November, at which time the species is quite vocal and territorial (S. K. Herzog in litt. 1999, 2007).
Accessible areas with suitable habitat are being cleared for cultivation of coffee, citrus fruit and, at lower altitudes, coca and tea (S. K. Herzog in litt. 1999, 2007). The soils on which its preferred forest grows are relatively rich, and are being exploited for small-scale agriculture by immigrants from the Bolivian altiplano. Nevertheless, large tracts of pristine habitat remain within the range and tree cover loss is currently low, albeit accelerating in recent years (Global Forest Watch 2022).
Conservation Actions Underway
The species occurs within Manú and possibly Bahuaja-Sonene national parks, Peru. It is listed as Endangered at the national level in Bolivia and Peru (Ministerio de Medio Ambiente y Agua 2009, SERFOR 2018).
11 cm. Small, yellow-rumped arboreal antwren. Male has a black crown and narrow eye-stripe. Whitish eyebrow, throat and breast, merging into grey sides of neck. Olivaceous upperparts. Tail and wings duskier with yellow wing-bars and fringes. Bright yellow lower back and rump and pale yellow belly. Female has brownish olive crown and upperparts, with yellowish olive rump. Duller grey on breast. Similar spp. Both sexes of Rufous-rumped Antwren E. callionota have rufous on rump. Voice High-pitched, slightly accelerating trill, with the last notes rapidly descending in pitch.
Text account compilers
Hermes, C.
Contributors
Ashpole, J, Brumfield, R., Catenazzi, A., Herzog, S.K., Isherwood, I., Kreft, S., O'Brien, A., Sharpe, C.J., Stuart, T., Symes, A., Tobias, J. & Walker, B.
Recommended citation
BirdLife International (2024) Species factsheet: Yellow-rumped Antwren Euchrepomis sharpei. Downloaded from
https://datazone.birdlife.org/species/factsheet/yellow-rumped-antwren-euchrepomis-sharpei on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.