Caribou are one of the most charismatic and enigmatic animals of the high north-and the most important subsistence mammal in Alaska. Today most barren-ground caribou herds in North America are in decline, with some herds down >80% in 30 years prompting Canada to list the species as 'threatened' in 2016. A few Alaska herds are currently up in numbers, including the Fortymile and Porcupine herds.