The male cormorants are busy finding nesting materials and trying to attract mates. Each time a male finds a good nest-building twig, the event is celebrated by a showy victory lap around the colony's nesting trees before presenting the twig to its mate, or potential mate.
During this season, breeding-age cormorants' of both sexes sport large, greyish plumes above their eyes. These plumes give them the "double-crested" part of their name, and also give them the appearance of being shaggy-eyebrowed old men. Obviously, different species have very different ideas about what is sexy.