Reindeer, or caribou, constitute the genus Rangifer, and are large clumsily built deer, inhabiting the sub-Arctic and Arctic regions of both hemispheres.
Lower than Calgary, is a decidedly sub-arctic climate.
Excepting the barren lands of the Antarctic regions, with which Patagonia is somewhat associated by a broken string of islands, the nearest continental lands of a more habitable kind are South Africa and New Zealand., In contrast to the sub-Arctic land ring, here is a sub-Antarctic ocean ring, and as a result the land flora and fauna of South America to-day are strongly unlike the life forms of the other south-ending continents.
There is a tropical flora in the deep gorges, higher up a sub-tropical, then a temperate, then a sub-arctic flora.
Engler's Versuch einer Entwickelungsgeschichte der Pflanzenwelt (Leipzig, 1879-1882), we should have in Siberia (a) the arctic region; (b) the sub-arctic or coniferous region - north Siberian province; (c) the Central-Asian domain - Altai and Daurian mountainous regions; and (d) the east Chinese, intruding into the basin of the Amur.
Russia; the Valdai tablelands, where all the great rivers of Russia take their rise; the broad and gently sloping meridional belt of the Ural Mountains; and lastly the Taimyr, Tunguzka and Verkhoyansk ranges in Siberia, which, notwithstanding their sub-Arctic position, do not reach the snow-line.