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 is the murre that is relatively little known to most birders, being greatly outnumbered in most frequently birded areas by the Common Murre. Audubon's climate model projects a 66 percent loss of current winter range by 2080, with a significant amount of potential expansion predicted. However, this potential increase is tempered for several reasons. In general, Thick-billed Murres favor cold-water fish, whose availability in a changing climate has proved vexing to modelers. Also, the species has shown some susceptibility to human disturbance—a threat that may increase substantially with increased shipping and infrastructure at high latitudes.