Sabine's gull insect larvae taken include terrestrial and aquatic beetles, springtails, craneflies, mosquitos, midges, and flower flies (Syrphidae). Sabine's gull The Sabine's gull ("Xema sabini"), also known as the fork-tailed gull or xeme, is a small gull. Its generic placement is disputed; some authors treat it as the sole species in the genus Xema as Xema sabini, while others retain it in the genus "Larus" as Larus sabini. The Sabine's gull breeds in colonies on coasts and tundra, laying two or three spotted olive-brown eggs in a ground nest lined with grass. It is very pelagic outside the breeding season. It takes
Swallow-tailed gull flying and hunting over the open ocean. The main breeding location is in the Galápagos Islands, particularly the rocky shores and cliffs of Hood, Tower and Wolf Islands, with lower numbers on most of the other islands. It is more common on the eastern islands where the water is warmer. It is the only fully nocturnal gull and seabird in the world, preying on squid and small fish which rise to the surface at night to feed on plankton. The swallow-tailed gull has no structural or plumage differences between the male and female. In the breeding season, the adult has