Although territory and nest site defence, incubation, and chick feeding are often shared tasks, there is sometimes a division of labour in which one mate undertakes all or most of a particular duty.
Selvom forsvaret af territorium og rede, rugning og fodring af unger ofte er delte opgaver mellem magerne, findes der undertiden en arbejdsdeling, hvor den ene mage udfører alt eller det meste af en bestemt opgave.