In zoology, the actions by which an animal, or group of animals, protects its territory from incursions by others of its species.
Territorial boundaries may be marked by sounds (e.g., birdsong ), scents, or even piles of dung. If such advertisement does not discourage intruders, chases and fighting follow. Territories may be seasonal (usually for nesting and feeding the young) or maintained permanently (for hunting and living). Territorial behaviour benefits the species by permitting mating and rearing young without interruption and by preventing overcrowding and minimizing competition for food.