Musk oxen are large, shaggy mammals native to the Arctic regions of North America and Greenland. They are known for their thick fur, which helps them survive in extremely cold temperatures. Musk oxen have a distinctive appearance, with long curved horns and a sturdy build, allowing them to navigate their harsh environments. These animals are herbivores, primarily feeding on grasses, mosses, and other vegetation. Musk oxen live in herds, which provide protection against predators like wolves. They are also known for their unique defense mechanism, where they form a circle around their young when threatened.