animal migration
movement of animals from place to place, usually seasonal
insect migration
seasonal movement of insects
Sardine Run
fish migration off the shores of South Africa
human guided migration
technique to restore migratory routes of endangered birds
bird migration
seasonal movement of birds
somatic migration
migration of parasites inside bodies
fish migration
movement of fishes from one water body to another
Monarch butterfly migration
Monarch butterflies' migrations across North America