Kelp Gull | Pacific Gull | Gull | Yellow-legged Gull | Sooty Gull | gull | Black-billed Gull | Silver Gull | Red-billed Gull | Percival Gull | Mediterranean Gull | Grey Gull | Franklin's Gull | Caspian Gull | Western Gull | The ''Larus'' gulls interbreed in a ring around the arctic. 1: Lesser Black-backed Gull | Sir William Gull, 1st Baronet | Sabine's Gull | Olsenbanden tar gull | lesser black-backed gull | kelp gull | Heuglin's Gull | Heermann's Gull | Gull-wing door | Gull Lake | Glaucous Tanager | glaucous | Black-tailed Gull | Birula's Gull |
Glaucous (from the Latin glaucus, meaning "bluish-grey or green", from the Greek glaukós) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants, as well as in the names of birds, such as the Glaucous Gull (Larus hyperboreus), Glaucous-winged Gull (Larus glaucescens), Glaucous Macaw (Anodorhynchus glaucus), and Glaucous Tanager (Thraupis glaucocolpa).
There are several other taxonomically unclear examples that belong in the same superspecies complex, such as Yellow-legged Gull (L. michahellis), Glaucous Gull (L. hyperboreus), and Caspian Gull (L. cachinnans).
They also compete directly for lemmings and other prey with several predators, including Rough-legged Hawks, Golden Eagles, Peregrine Falcons, Gyrfalcons, jaegers, Glaucous Gulls, Short-eared Owls, Great Horned Owls, Eurasian Eagle Owls, Common Ravens, wolves, arctic foxes, and ermine.