Do fishes and butterflies migrate like birds?
Depends on the species and there are also various reasons why they do so. Salmon, for instance, migrate upstream to where they were born in order to spawn. Monarch butterflies also migrate, though I forget the specific reasons. Birds obviously migrate because food is more plentiful in warmer climates. You can find similar patterns in many types of animals, including birds, fish, insects, mammals, and reptiles. Usually migratory habits are in some way either related to food availability or mating/spawning rituals.
