The darker the color, the more favorable the climate conditions are for survival. The outlined areas represent approximate current range for each season. More on reading these maps.
“Utah Gull” might have been a better name for this bird. Not only is the California Gull the Utah state bird, it breeds mainly in sizeable colonies on inland lakes in Utah and elsewhere in the Intermountain West and northern Great Plains. Audubon's climate model forecasts contractions and disruptions of suitable climate space in both winter and summer, with the summer situation of considerably greater concern. In winter, California Gulls are resourceful and adaptable scavengers: a few landfills and fish-filled harbors are all they need. The species’ summer distribution, however, is already affected by desertification and diversion—threats that are likely to intensify under most climate-change scenarios.