Justification of Red List Category
Based on a model of future deforestation in the Amazon basin it is suspected that the population of this species will decline rapidly over the next three generations, and it has therefore been uplisted to Vulnerable.
The global population size has not been quantified, but the species is described as uncommon to fairly common throughout its range (del Hoyo et al. 2003, Zimmer et al. 2016).
This species is suspected to lose 33.5-35.8% of suitable habitat within its distribution over three generations (15 years) based on a model of Amazonian deforestation (Soares-Filho et al. 2006, Bird et al. 2011). Given the susceptibility of the species to fragmentation and/or edge effects, it is therefore suspected to decline by ≥30% over three generations.
Thamnophilus tenuepunctatus has a large range on the east slopes of the Andes, and is generally considered uncommon to fairly common. The nominate subspecies tenuepunctatus is endemic to north-central Colombia, occurring in Norte de Santander, Cundinamarca and Meta departments. Subspecies tenuifasciatus occurs in Putumayo, south-central Colombia. This taxon is also found in Ecuador, ranging from Sucumbios southwards to north Zamora-Chinchipe. Subspecies berlepschi occurs in south Zamora-Chinchipe, and the regions of Amazonas, Cajamarca and San Martín in north-east Peru (del Hoyo et al. 2003).
This is primarily an understorey species of humid evergreen forest edges, preferring elevations of 500-1,700 m. It has also been known to occur in clearings, plantations, parks and gardens. It feeds mainly on insects and other arthropods. Breeding has been documented in late March (Zimmer et al. 2016).
The primary threat to this species is accelerating deforestation as land is cleared for cattle ranching and soy production, facilitated by expansion of the road network (Soares-Filho et al. 2006, Bird et al. 2011).
Conservation Actions Underway
None is known.
Conservation Actions ProposedExpand the protected area network to effectively protect IBAs. Effectively resource and manage existing and new protected areas, utilising emerging opportunities to finance protected area management with the joint aims of reducing carbon emissions and maximizing biodiversity conservation. Conservation on private lands, through expanding market pressures for sound land management and preventing forest clearance on lands unsuitable for agriculture, is also essential (Soares-Filho et al. 2006).
15-16 cm. Medium-sized, dimorphic antshrike. Both sexes have a crest and a yellowish iris. Male is black with narrow white bars throughout, except on plain black crown, and throat, which is white streaked with black. In the female, crown, upperparts, wings and tail are rufous. Underparts black with white bars as with male; throat and side of head likewise white with black streaks. Voice Song is a loud series of accelerating, abrupt nasal notes, rising in pitch initially and falling towards the end, where it finishes with a rasping note.
Text account compilers
Khwaja, N., Pilgrim, J., Symes, A., Sharpe, C J
BirdLife International (2022) Species factsheet: Thamnophilus tenuepunctatus. Downloaded from http://www.birdlife.org on 17/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/08/2022.