Animal movement is a key part of population ecology, helping us understand how species use their environment and maintain viable populations. In many territorial species, most movements occur within a home range. Occasionally, however, individuals make long-distance movements.
Long-distance movements are important: they ensure that populations mix and do not inbreed, but they can also spread infection between populations. They are also rare, so long-distance movements are difficult to study and require large, long-term studies.