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.
The otherwise yellow male Wilson’s Warbler is easily recognized by its shiny black cap. It is a widespread species and one of very few warblers that could be seen almost anywhere in North America. For nesting, it favors moist thickets, such as streamside willows. Audubon's climate model projects a 76 percent loss of current summer range by 2080, showing the species retreating north and up in elevation as the climate warms. This may cause the species to disappear as a breeder in much of the western U.S. Most Wilson’s Warblers winter in Middle America, so the projected decrease in available climate-space is not entirely alarming.