Wiktionary
mountain hare
n. A Eurasian species of hare, (taxlink Lepus timidus species noshow=1).
Wikipedia
Mountain hare
The mountain hare (Lepus timidus), also known as blue hare, tundra hare, variable hare, white hare, snow hare, alpine hare and Irish hare, is a hare that is largely adapted to polar and mountainous habitats.