What is the mass movement of a population from one area to another called?

The mass movement of a population from one area to another is referred to as migration. This term specifically describes the seasonal or periodic movement of animals from one habitat to another, often in search of food, mating opportunities, or suitable environmental conditions. Migration is a key behavior observed in many species and is influenced by factors such as climate, availability of resources, and reproductive cycles.

In contrast, dispersion refers more to the spreading out of individuals within a population in a given area rather than a mass movement from one area to another. Foraging pertains to the behavior associated with searching for and exploiting food resources, while translocation generally describes the purposeful movement of organisms from one location to another, often for conservation purposes. Therefore, "migration" accurately captures the essence of a population's mass movement across distances between different regions.