Seasonal migration is the regular movement of animals from one place to another in response to changes in the seasons. For example, many birds, like swallows, fly south during the winter to find warmer weather and more food. In spring, they return to their breeding grounds, where they can raise their young in a more favorable environment. This behavior is not limited to birds; many other animals, such as caribou and monarch butterflies, also migrate seasonally. These migrations help ensure that animals can survive and thrive by taking advantage of seasonal resources, like food and suitable habitats, throughout the year.