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.
Guillemots are birds of rocky seacoasts. The Pigeon Guillemot is the West Coast representative, ranging south regularly to southern California. In recent geologic time, the species has been prevented by basic biogeography from getting to eastern North America: there has simply been too much land and ice in the way. However, Audubon’s climate model indicates considerable areas of climatic suitability off eastern Canada both at the present time and into the future. With projected troubling contraction of the current range and the ongoing melting of Arctic sea ice, it is possible that the mobile and adaptable Pigeon Guillemot may occupy new regions far to the east of where it occurs today, even as its present summer climate space declines in the west.