Depending on their location reindeer are also called caribou. Baby calves have two little lumps for antlers. As they grow their small lumps turn into antlers. Once a year reindeer shed their antlers because it helps them camouflage in the winter. Reindeer is of the first domesticated animals. The male reindeer can grow up to 28 to 53 inches (70 to 135 cm) tall from hooves to shoulder. Female reindeer are typically smaller, 5.5 to 6.2 feet (1.7 to 1.9 m) long. Reindeer are found in Canada, Greenland, Alaska, northern Europe, and northern Asia in mountains, tundra, and woodland habitats.