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.
This bird was until fairly recently treated as the same species as the American Golden-Plover. The Pacific, however, is distinctive in various aspects of appearance, behavior, and ecology. It breeds on dry tundra in Alaska and Siberia, a habitat that is undergoing radical changes, and winters widely in the Pacific Ocean region, with small numbers reaching coastal California. Records inland are very rare, but that may change. Audubon's climate model shows areas of suitable climate becoming available in the Central and Imperial valleys of California, and even in the Owens Valley east of the Sierra, though by 2080 there will be no overlap with the current North American winter climate space. If the species colonizes these inland sites, a key question will be water availability in a region already beleaguered by diversion and desertification.
Are the projected range maps different from the range maps in field guides? Find the answer here.