Detroit River International Wildlife Refuge The Detroit River International Wildlife Refuge is seeking volunteer amateur naturalists, birders, botanists, and students interested in working with biological and environmental science to conduct biological field surveys during spring, summer, and fall of 2012 and beyond. A minimum of two hours per week is all that is required. Monitoring marsh wrens on June morning at the Brancheau Unit An ideal opportunity to receive training and use biological monitoring techniques across the 16 Refuge Units along western Lake Erie. This data will be used to monitor and develop research on ecosystem response to invasive species management and habitat restoration projects. Contact USFWS Biologist Greg Norwood 734.692.7611 or greg_norwood@fws.gov