The Ring-billed Gull (Larus delawarensis) is a common winter resident throughout Nevada but is not known to breed in the state (Conover 1983, Ryser 1985). According to the A.O.U. Check-list (1983), the breeding range of the Ring-billed Gull in western North America extends from the northwestern United States and prairie regions of Canada south to northeastern California (Honey Lake), south-central Idaho, south-central Colorado, southeastern Wyoming, and northeastern South Dakota (Waubay Lake).