Migration is the seasonal movement of animals looking for food. They also move because of the weather. Some birds move because its too cold and want to be somewhere its warm. When its cold not a lot of bugs are out and about so birds move to other places where there are bugs. Another reason is the animals mate.
Birds move from place to place in order to: find food, be warm, or mate with another.
They move to find food whenever it gets cold and bugs don't come out.
Looking for the right one
Some animals move to a place in order to find a partner and mate with.
Animals talk to each other, like us, but in a different way. When an animal is mad or they don't want them near them, they growl. Some challenge others by moving there foot across the ground. Male spiders, in order to find a mate, do a little dance to the female spiders. Skunks spry there enemy whenever they are scared of them or don't want them near them.