Like most islands, the Galapagos counts sea gulls among its population of sea birds. Surprisingly, however, the two species of gull found in the Galapagos are both unique species, found nowhere else. The beautiful Swallow-tailed sea gull, with its striking red eye rings, is the only sea gull in the world that fishes at night. The rare lava gull gets its name from its dark gray plumage that camouflages it on the dark lava rocks. The entire breeding population of lava gulls consists of only about 800 breeding pairs.