Food scarcity: When food resources become scarce in an area, animals may migrate to areas where food is more abundant.
Overpopulation: If an area becomes overpopulated, animals may migrate to areas with lower population densities in order to reduce competition for resources.
Social interactions: Social interactions such as competition for resources, territorial disputes, and predation can also cause animals to migrate.
Seasonal changes: Some animals migrate seasonally in order to take advantage of changes in temperature, food availability, and breeding opportunities.