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 western counterpart of the more widespread Tree Swallow likes it high and dry. Where Violet-green and Tree swallows overlap, the former tends to be found in drier woods, often in the foothills or mountains. The Violet-green is versatile, however. It gets around, and Audubon's climate model suggests the potential for dramatic range shifts in the decades ahead. The model projects a loss of 64 percent of current summer range, with some potential expansion across a fair swath of the Arctic; if there are enough trees for nest cavities, the swallows, forecast to withdraw from today’s core range, may follow. In winter, the Violet-green Swallow might establish in the Gulf Coast states, especially in peninsular Florida and South Texas