5 thoughts on “Uniform Woodcreeper (Hylexetastes uniformis)”
This species is near-endemic to Brazil, with the great majority of its range in this country, so the Brazilian National Red List assessment is relevant.
It is listed as VU on the National Assessment, based on rates of habitat loss and degradation within its range over three past generations, resulting in a suspected decline of 30-50% (see: https://doi.org/10.37002/salve.ficha.22259). This estimate is referenced to the work of Barlow et al. (2016) who calculated the effects of forest degradation (fires and selective logging) which results in declines in forest specialist species even if not reflected in loss of forest cover. According to the work by Barlow et al., loss of 20% primary forest cover results in 39-54% loss in conservation value, or 96-171% greater decline, compared with the 50% assumed here (https://www.nature.com/articles/nature18326).
Conservation value was defined by Barlow et al. as the sum of forest species presences, so although it was not calculated specifically for this species, it was calculated based on forest-dependent bird species in the same geographic area and habitat, and thus seems appropriate to apply in this situation.
The Brazilian National Red List assessment mentions this species’ forest dependence, and that it is rarely observed in disturbed forest habitat.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 26 June 2023. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’ Red List status on this page on 26 June 2023, when discussions will re-open.
Based on information submitted during this Forum process, the rate of population decline has been re-calculated and the species re-assessed against Criterion A. It is now recognised that the additional impacts of habitat degradation may be more severe than previously assumed for this strictly forest-dependent species. While tree cover loss is 13-16% over three generations, the overall rate of habitat loss may be considerably larger. Given the species’ high sensitivity to additional forest degradation, fragmentation and disturbance, it is here precautionarily suspected that the population declines at roughly twice the rate of tree cover loss. They are here placed in the band 25-39% over three generations.
Therefore, based on available information, our preliminary proposal for the 2023 Red List would be to list Uniform Woodcreeper as Vulnerable under Criteria A2c+4c.
There is now a period for further comments until the final deadline on 2 July 2023, after which the recommended categorisations will be put forward to IUCN.
The final 2023 Red List categories will be published on the BirdLife and IUCN websites in December 2023, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and we will post a final decision on this species’ Red List status on this page on 10 July 2023.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Uniform Woodcreeper is recommended to be listed as Vulnerable under Criteria A2c+4c.
Many thanks for everyone who contributed to the 2023.2 GTB Forum process. The final 2023 Red List categories will be published on the BirdLife and IUCN websites in December 2023, following further checking of information relevant to the assessments by both BirdLife and IUCN.
This species is near-endemic to Brazil, with the great majority of its range in this country, so the Brazilian National Red List assessment is relevant.
It is listed as VU on the National Assessment, based on rates of habitat loss and degradation within its range over three past generations, resulting in a suspected decline of 30-50% (see: https://doi.org/10.37002/salve.ficha.22259). This estimate is referenced to the work of Barlow et al. (2016) who calculated the effects of forest degradation (fires and selective logging) which results in declines in forest specialist species even if not reflected in loss of forest cover. According to the work by Barlow et al., loss of 20% primary forest cover results in 39-54% loss in conservation value, or 96-171% greater decline, compared with the 50% assumed here (https://www.nature.com/articles/nature18326).
Conservation value was defined by Barlow et al. as the sum of forest species presences, so although it was not calculated specifically for this species, it was calculated based on forest-dependent bird species in the same geographic area and habitat, and thus seems appropriate to apply in this situation.
The Brazilian National Red List assessment mentions this species’ forest dependence, and that it is rarely observed in disturbed forest habitat.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 26 June 2023. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’ Red List status on this page on 26 June 2023, when discussions will re-open.
Preliminary proposal
Based on information submitted during this Forum process, the rate of population decline has been re-calculated and the species re-assessed against Criterion A. It is now recognised that the additional impacts of habitat degradation may be more severe than previously assumed for this strictly forest-dependent species. While tree cover loss is 13-16% over three generations, the overall rate of habitat loss may be considerably larger. Given the species’ high sensitivity to additional forest degradation, fragmentation and disturbance, it is here precautionarily suspected that the population declines at roughly twice the rate of tree cover loss. They are here placed in the band 25-39% over three generations.
Therefore, based on available information, our preliminary proposal for the 2023 Red List would be to list Uniform Woodcreeper as Vulnerable under Criteria A2c+4c.
There is now a period for further comments until the final deadline on 2 July 2023, after which the recommended categorisations will be put forward to IUCN.
The final 2023 Red List categories will be published on the BirdLife and IUCN websites in December 2023, following further checking of information relevant to the assessments by both BirdLife and IUCN.
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and we will post a final decision on this species’ Red List status on this page on 10 July 2023.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Uniform Woodcreeper is recommended to be listed as Vulnerable under Criteria A2c+4c.
Many thanks for everyone who contributed to the 2023.2 GTB Forum process. The final 2023 Red List categories will be published on the BirdLife and IUCN websites in December 2023, following further checking of information relevant to the assessments by both BirdLife and IUCN.