Bumble Bees of North America: An Identification Guide
More than ever before there is widespread interest in studying bumble bees and the critical role they play in our ecosystems. This is the first comprehensive guide to North American bumble bees to be published in more than a century. It allows amateur and professional naturalists to identify all 46 bumble bee species found north of Mexico and to understand their ecology and changing geographic distributions. It draws on the latest molecular research, shows the enormous colour variation within species, and guides readers through the many confusing examples of convergence. It draws on a large repository of data from museum collections and presents state-of-the-art results on evolutionary relationships, distributions, and ecological roles. Illustrated keys allow identification of colour morphs and social castes.