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 the decline vary with region and subspecies. Causes of declines include habitat changes, which do not appear reversible within three generations.

Available at: https://www.iucnredlist.org/species/29742/22167140