|in North America it's called a "Caribou"|
The Caribou is a member of the deer family, living in the northern regions (like the North Pole). Unlike other deer, Caribou of both sexes have antlers. Like other deer, they are herbivores - meaning they eat plants. They have extraordinarily thick and buoyant coats, enabling them to live in extremely cold weather, and actually sleep while floating in water.
There are millions of Caribou/Reindeer in the world. Almost all species
migrate twice a year, following safe and trusted routes they've taken every spring and fall for centuries that are about 600 to 800 miles long. (They walk or run, not fly) . On migratory trips, the adult females leave about two weeks before the rest. The males and juveniles leave later.