Reindeer (Rangifer tarandus) is categorized as Vulnerable A2a due to an observed 40% decline over three generations (about 21-27 years) across the circum-Arctic countries, when Rangifer declined from about 4,800,000 to 2,890,410 individuals. Uncertainty is high about the extent of the decline and the under-lying mechanisms except at a general level. Extent and causes of…
Category: Extinction Edition
I’iwi
I’iwi (Drepanis coccinea) has experienced rapid declines in some parts of its range, and is projected to decline substantially by 2100 as a result of climate change and the resultant increased prevalance of avian malaria. The newly-introduced tree disease known as Rapid ‘Öhi’a Death may also cause declines. Overall, a population reduction of 30-49% is…
Sprague’s Pipit
Sprague’s Pipit (Anthus spragueii) qualifies as Vulnerable owing to a rapid ongoing population decline. However, the rate of decline in the U.S.A. is now not as severe as it formerly was and overall declines may be slowing. Available at: https://www.iucnredlist.org/species/22718591/152502644
Loggerhead Turtle
The global population of the Loggerhead Turtle (Caretta caretta) comprises 10 subpopulations that vary widely in population size, geographic range, and population trends, and are the appropriate units for assessment of global conservation status for this species (Wallace et al. 2010, 2011). As such, assessments have been completed for each of the 10 subpopulations, in…
Amazonian Manatee
Amazonian Manatee (Trichechus inunguis) is listed as Vulnerable based on a suspected population decline of at least 30% within the next three generations (assuming a generation length of 25 years) due primarily to ongoing levels of hunting throughout most of the region, coupled with increasing incidental calf mortality in the recent years, global warming trends…
Marbled Murrelet
Marbled Murrelet (Brachyramphus marmoratus) is still abundant, but it is treated as Endangered because its population is estimated to have undergone a very rapid reduction, especially in the southern portion of its range, which is expected to continue, owing to a variety of threats. Available at: https://www.iucnredlist.org/species/22694870/178976917