The Pika Who Makes Hay While the Sun Shines
High on rocky mountain slopes, where winters are long and the snow lies deep, lives a small furry animal that looks like a round-eared hamster. It is called a pika, and it is a relative of rabbits. Unlike many mountain animals, the pika does not hibernate. It stays awake all winter, which means it needs food every single day.
Plants are buried under snow for months, so the pika solves the problem during the short summer. It runs back and forth between the meadow and its home among the rocks, carrying mouthfuls of grasses, flowers and leaves. Then it spreads them out to dry in the sun, just as a farmer dries hay. When the plants are ready, the pika tucks them into a pile beneath a sheltering rock. This hidden store is called a haypile.
A pika can make dozens of trips in a single day, and a large haypile may take the whole season to finish. When winter comes, the animal lives off its stored food, moving through tunnels under the snow to reach it. Pikas often choose plants that stay fresh for a long time, which makes the haypile a healthy meal.
Pikas also keep watch. A sharp whistle warns neighbors when a hawk or a weasel is near. Because these animals are built for cold places, a very warm day can be hard on them, so many scientists study pikas to learn how mountain habitats are changing.