What is a common reason for high emigration rates in animal populations?

High emigration rates in animal populations are often driven by overpopulation. When a species experiences a significant increase in its population density, resources such as food, shelter, and nesting sites may become scarce. This scarcity can lead to increased competition among individuals for these limited resources. As competition intensifies, some individuals may choose to leave their current habitat in search of better conditions elsewhere, leading to higher emigration.

In contrast, increased food availability would likely encourage individuals to stay within an area, as it supports survival and reproduction. Higher reproduction rates may contribute to increased population size but do not directly determine emigration rates; instead, they might lead to overpopulation if resources are insufficient. Stable habitats tend to support resident populations, as individuals are less likely to leave if their environment is conducive to survival and reproduction. Thus, overpopulation creates the conditions that lead to higher emigration rates in search of more favorable living conditions.