Sula granti

One of the three species of Boobies in the Galapagos Islands, the Nazca Boobies were formerly thought to be a subspecies of Masked Boobies (Sula dactylactra). These photogenic sea birds can be found on all the islands, and when saw them on Genovesa Island, they were beginning to show typical mating behavior, with the males offering nesting sites and materials to the females.