Data Zone
Justification of Red List category
This species is restricted to a small range, which is under imminent threat from rapid habitat loss. It is therefore listed as Vulnerable.
Population justification
The population size has not been quantified. It may not be possible to make an overall population estimate based on the availability of habitat for breeding, because of the absence of this species in many areas where conditions seem to be suitable (O. Cortes-Herrera in litt. 2016). It is here tentatively suspected that the population numbers less than 10,000 mature individuals overall, but the population may well be smaller (see Renjifo et al. 2016) and urgently requires accurate quantification.
Based on observational records within the small range (per eBird 2021) it is assumed that the species forms one single subpopulation (see also Zapata et al. 2020).
Trend justification
The species is declining as a result of historical and continuing habitat alteration, as land has been converted for mining, agriculture, pasture and infrastructural developments (Lara et al. 2012). It is estimated that between 2000 and 2015, 29% of suitable habitat was lost from the range (Negret et al. 2021). Assuming that habitat loss continued at this rate to the present day and that population declines are equivalent to habitat loss, this equates to a suspected population reduction of 20% over the past ten years. Projecting the rate forward from 2015 to 2040 suggests that habitat loss will increase to 50% over this period (Negret et al. 2021), which translates to a rate of decline of 37% over the next ten years.
The species occurs in the northern part of the Cauca Valley from Ituango south to Concordia and Salgar in Antioquia, northwestern Colombia.
The species inhabits semi-decidous dry forest habitat with secondary vegetation and an open understorey, vegetation along watercourses and dry shrubland (Lara et al. 2012, Fjeldså 2020). It appears tolerant of highly converted habitats, and is also found in open areas and near busy roads (Fjeldså 2020).
Despite its high tolerance of secondary growth and open areas, the species is threatened by habitat conversion for mining, agriculture, pasture, road construction and infrastructural developments (Lara et al. 2012, O. Cortes-Herrera in litt. 2016, Renjifo et al. 2016). Habitat loss is projected to continue into the future (Negret et al. 2021). A large amount of its range may be lost to flooding due to construction of the Ituango hydroelectric power dam (Lara et al. 2012); its completion was scheduled for 2018, but got delayed to 2022.
Conservation Actions Underway
No targeted actions are known for this species.
Conservation Actions Proposed
Accurately quantify the population size and density. Investigate the species's habitat requirements and ability to persist in degraded habitats. Research the ecological consequences of the hydroelectric power dam. Research possible actions that could limit the severity of the impact of the hydroelectric power dam. Monitor the population trend. Monitor rates of habitat loss.
Protect suitable habitat within the range. Urgently implement actions to mitigate the negative impact of the hydroelectric power dam on the species and its habitat. Raise awareness for the species and its habitat.
Text account compilers
Hermes, C.
Contributors
Cortés, O. & Westrip, J.R.S.
Recommended citation
BirdLife International (2024) Species factsheet: Antioquia Wren Thryophilus sernai. Downloaded from
https://datazone.birdlife.org/species/factsheet/antioquia-wren-thryophilus-sernai on 26/12/2024.
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 26/12/2024.