piquero peruano sula variegata small colony

adults alcatraz america animal ballestas beach beauty behavior bird birdwatching blue booby boulder coast colony detail environment flying fonso group guanera habitat humboldt island islands nature observation ornithology paracas peaceful pelagic perched peru peruano peruvian pikeman piquero preening preying rock rocky sky small south stone sula suliform summer variegata vertebrate wild wildlife