Storks are large white birds that migrate long distances between Europe and Africa. They have long red beaks and legs. Storks nest in groups on trees, buildings, and rocky areas, building large nests of branches that are added to over the years. They eat small animals like frogs, mice, and insects. In late summer, storks migrate south in large flocks to winter in places like the Sahara desert, flying as far as 10,000 km, then return north to Europe in spring to breed.