Larus oregonus

Larus oregonus is an extinct species of gull that lived during the Late Pleistocene.

Etymology
The genus name Larus derives from Ancient Greek, referring to a seabird. The species name oregonus derives from Oregon, the state where Edward Drinker Cope collected the type specimen.

Description
Larus oregonus specimens stem from Fossil Lake, Oregon and Camp Cady, California. Larus oregonus is about the same size as the ring-billed gull (Larus delawarensis).