Squirrels have bushy tails, powerful jaws, and long bodies. They eat nuts, insects, eggs, and plant matter. Squirrels live everywhere except Australia and Antarctica, raising one or two litters per year, and can live up to 12 years, though many die younger due to predators like hawks, snakes, foxes, and weasels. Squirrels protect themselves by running, hiding, and fighting, and live in trees, so it's important not to cut them down.