Small mammal of the family Ochotonidae,
belonging to the order Lagomorpha (rabbits
and hares). Pikas have short rounded ears,
and most species are about 20 cm/8 in long,
with greyish-brown fur and no visible tail.
They live in mountainous regions of Asia and
North America. The warning call is a sharp
whistle. They are vegetarian, and in late
summer cut grasses and other plants and place
them in piles to dry as hay, which is then
stored for the winter.