Dams, declining water quality, hatchery fish, and over-fishing have sent this precious resource of the Pacific Northwest spiraling toward extinction. Oregon, Washington, Idaho, northern California, western Canada, and Alaska. The decline of this wetland-dependent plant signals the imperiled state of America's wetlands. The conversion of grasslands for agriculture and development and historic over-hunting have devastated populations of these birds. Grasslands in Texas, California, Oregon, Washington, Idaho, Nevada, Utah, Kansas, New Mexico, Oklahoma, Colorado, Wyoming, Montana, the Dakotas, Alberta, and Saskatchewan.
Mature pine forests throughout the southeastern U.S. and eastern Texas.
Arizona's Yuma, Pica, and Maricopa counties and the northwestern part of Sonora, Mexico. Human development and extermination programs have driven these once-abundant species toward imperilment. The only native migrating population travels between Wood Buffalo National Park in Canada's Northwest Territories and Texas' southern coast over central Canada and the American Midwest. There is an introduced, migratory population that breeds in Idaho and a non-migratory population in Florida's Kissimmee Prairie. Land conversion, fire suppression, and the invasion of exotic species have reduced populations of many species of butterflies and the plants on which these insects depend.