Why do ermine live in the tundra?

Ermine, or stoats, thrive in the tundra due to their adaptations to cold environments, including their thick fur that provides insulation and changes color for camouflage against snow. The tundra offers abundant prey, such as small mammals, which are essential for their diet. Additionally, the open landscape allows for efficient hunting and movement, making it an ideal habitat for these agile predators.