Barren-ground caribou is a type of caribou that is found in the Arctic regions of North America. There are several synonyms for this species, including tundra caribou, Rangifer tarandus groenlandicus, and Arctic caribou. They are known for their unique adaptations, including large hooves and a thick coat of fur to help them navigate through the harsh Arctic conditions. The barren-ground caribou is an important resource for indigenous people in the region as they provide food and other materials. However, the species is facing numerous threats, including habitat loss and climate change, which are causing their numbers to decline.