Bumble Bees (Bombus) are threatened by a number of stressors including land use change, pesticides, and pathogens. The latter is thought to be a leading factor of their decline. In Michigan, seven species are listed as species of conservation concern in the state. Similarly, the federally endangered Bombus affinis and five other species are recently reported to be extirpated from the state. Several factors, such as landscape composition, floral resource quality, and distance from commercial colonies have been shown to influence pathogen transmission; however there are gaps in our understanding of how the surrounding landscape may mediate local environmental effects on pathogen infections in bumble bees. To investigate these unknowns, two species of bumble bee workers will be collected from UMBS sites for pathogen analysis. Broad plant and bumble bee community surveys will be completed in conjunction with pathogen collections. This project will add to ongoing bumble bee pathogen research by expanding into Northern Michigan. The addition of samples from habitats will broaden our knowledge of the distribution and prevalence of bumble bee pathogens across longitudinal ranges, particularly in Michigan, where to our knowledge no formal pathogen survey has been completed for wild bumble bees foraging in natural areas.