Breeding seabird colonies require abundant food resources within foraging range of its members. In a large seabird colony, hundreds of thousands of birds mate and rear their hatchlings.
A neighboring colony of the same species may be of similar magnitude, yet there is no territorial competition between the closely situated colonies. Individuals in different colonies avoid overlap by voluntarily restricting themselves to areas where others in the same colony forage, and not encroach upon the neighboring colony’s feeding grounds. Some as yet unidentified information transfer takes place that establishes boundaries.