Bobo Norteño
A simple vista
Rango e identificación
Mapa de migración y distribución
Descripción
The only northern member of the booby family, the Northern Gannet is one of the most spectacular sea birds. During migrations gannets may be observed offshore, either gliding above the water or diving into the sea after fish, sometimes plunging headlong from heights as great as 50 feet (15 meters) or more. An intricate system of air sacs under the skin of the breast cushions the impact when a bird strikes the water. Gannets, like boobies, engage in an elaborate series of breeding displays. When one bird returns to a nest site, it is greeted by its mate. Both birds raise their heads and cross bills, which they clash together like swords, then bow to each other with wings and tails raised. This is followed by mutual preening of the head and neck. Usually the bird who has been relieved at the nest will pick up sticks or seaweed to present to its mate. Finally, the departing bird stands with head and neck extended straight up and wings raised over the back, then launches itself into the air.