Squirrels live on their own or with others in their nest, called a drey, and spend most of the day finding food. Except whilst a morning napping, squirrels look for leaves, grass, twigs and other objects necessary to build their nests as well as nuts and seeds to eat. Because they are keen-eyed and have sensitive whiskers, these rodents are wary of predators like cats. Since squirrels build up lots of different winter stock lairs, they do forget some of the places afterwards. Their food varies according to season. Amongst others, they feed on insects and caterpillars.