The word "migratory" means the act of moving from one place to another on a regular basis or at particular times, usually referring to animals. Full definition
Bird watchers flock to the Island to photograph many species of migratory birds as they follow their annual routes along the Pacific Flyway. (discovervancouverisland.com)
Much luxury has spread in the bird world — nearly 80 species of migratory birds make on Half Moon Caye regular stopover. (belize-travel.com)
This creature was recently listed under Appendix I and II in the Convention of Migratory Species of Wild Animals. (treehugger.com)