This discussion was first published as part of the 2018 Red List update. At the time a decision regarding its status was pended, but to enable potential reassessment of this species as part of the 2019 Red List update this post remains open and the date of posting has been updated.
This topic is open for comments on the following species:
Grey-rumped Treeswift (Hemiprocne longipennis), Silver-rumped Spinetail (Rhaphidura leucopygialis), Barred Eagle-owl (Bubo sumatranus), Wallace’s Hawk-eagle (Nisaetus nanus), Keel-billed Toucan (Ramphastos sulfuratus), Olive-backed Woodpecker (Dinopium rafflesii), Yellow-lored Amazon (Amazona xantholora).
Following the analyses of Tracewski et al. (2016), species assessments against criterion A have been carried out by extrapolating the rate of forest loss between 2000-2012 across a 3 generation period or 10 years (whichever is the longer), with the assumptions that population change is proportional to forest area change and that habitat loss has continued at the same rate to the present day. The generation lengths that have been used in this analysis are those held in the 2016 published Red List assessments, and so there may be some difference between the rates of decline presented here and those in Tracewski et al (2016).
In some cases the overall rate of change has been assessed as a different rate from that of forest loss, usually because there are additional threats such as hunting or invasive species that could be adding to overall declines in a species. Additionally, there may be some species which are inhabitants of forest edge/fragments and so forest loss may in fact be not having such a severe effect on them.
The rate of decline has then been compared to the threshold values for Vulnerable (30-49% decline), Endangered (50-79% decline) and Critically Endangered (≥80% decline) under criteria A2, A3 and A4. The Red List category Near Threatened does not have a threshold value, but to qualify for this category a species must approach the threshold for listing as Vulnerable. Therefore, species with a suspected rate of decline of >25% but <30% have been proposed to qualify as Near Threatened.
The pdf outlining species for potential uplisting under criterion A can be downloaded here: Deforestation Criterion A Uplists
Comments or further information regarding these proposed Red List statuses are very welcome.
Tracewski, Ł.; Butchart, S. H. M.; Di Marco, M.; Ficetola, G. F.; Rondinini, C.; Symes, A.; Wheatley, H.; Beresford, A. E.; Buchanan, G. M. 2016. Toward quantification of the impact of 21st-century deforestation on the extinction risk of terrestrial vertebrates. Conservation Biology 30: 1070-1079.