Bumble Bees of the Western United States

Abstract

Bumble bees have been the subject of many important ecological studies in the western U.S., including research on foraging behavior, floral resource competition, and pollination. They have also provided some of the first information about how altitudinal distributions of animals are changing due to the changing climate (moving up hundreds of meters in the Colorado Rocky Mountains since the 1970s). This guide will be a valuable resource for scientists conducting these kinds of research involving bumble bees.