When they feel like it. :/
South
well plenty of animals migrate like birds, they migrate to the south for winter. Bucks sometimes migrate when there is no food.
animals will migrate in winter to go south to warmer regions.
Animals migrate to the south for warmer climates.
birds
Animals migrate to find food, whether they are in Africa and facing a dry season, or are birds heading south for the winter.
Many animals are migratory and vary from region to region. For example Many species of birds migrate, as do whales, butterflies, manatees, and lot more.
They didn't migrate. Animals migrate.
not all animals migrate but birds and others do
they migrate and find their way when their parents migrate.
# they migrate down south
They migrate south for food