Migration is the ubiquitous phenomenon of long-distance movement of animals, usually on a seasonal basis. All major animal groups exhibit migration, including amphibians, birds, crustaceans, fish, insects, mammals, and reptiles. Migration may be triggered by changes in the local climate, such as birds flying to warmer, more southerly environments when the cold winter environments or wildebeest migrating for seasonal grazing lands. Other migratory animals move based on features of their biology, such as salmon leaving the freshwater rivers where they were born to mature in the ocean, and then migrating back to the same rivers to spawn.
The dinosaurs cloned by InGen similarly tried to migrate. This was seen most prominently in the velociraptors, which attempted to leave Isla Nublar in various ways.
