territoriality

Territorial behavior in animals is the defense of an area against others of the same species. This defense can involve vocalizations, scents, chases, or fighting. Territories are established for various reasons, including uninterrupted mating, raising young with less competition for food, and preventing overcrowding.1

The size and duration of territories vary greatly. Some territories are seasonal, like those of songbirds defending nesting and feeding areas. Others, like those of wolf packs, are maintained for hunting and living. Even in communal nesting birds like gulls, the territory might be as small as the nest itself.1

Territoriality acts as a spacing mechanism, allocating resources like food, mates, and shelter to a population segment while excluding others. It is favored when resources are economically defendable, meaning the benefits of restricting access outweigh the costs of defense.23