Affectionate Northern Gannets
Although they are not the only birds to engage in similar behaviour, gannets are famous for "billing" or “mutual fencing.” While it can happen any time both birds from a mated pair are at their nest site, it is quite routine when one bird returns to the nest after foraging for food or nesting material. The two gannets will face each other, often touching and calling. They then shake their heads side to side with their bills clacking together. They often bow, rub necks, and preen each other’s neck before taking up the more mundane activities of nesting in colonies, such as bickering and fighting with neighbors.
Affectionate Northern Gannets
Although they are not the only birds to engage in similar behaviour, gannets are famous for "billing" or “mutual fencing.” While it can happen any time both birds from a mated pair are at their nest site, it is quite routine when one bird returns to the nest after foraging for food or nesting material. The two gannets will face each other, often touching and calling. They then shake their heads side to side with their bills clacking together. They often bow, rub necks, and preen each other’s neck before taking up the more mundane activities of nesting in colonies, such as bickering and fighting with neighbors.