Ospreys are one of the most well-established ecological bioindicator species because their nest distribution and productivity reflect patterns and changes in the foodweb that supports them. Osprey tissues (eggs, blood, feathers) reflect contaminants in aquatic ecosystems and as a result, they are regularly sampled throughout their range to monitor geographic and temporal contaminant patterns.
DeSorbo, C. R., R. Gray, & I. Johnson.. (2011). Osprey Nest Abundance, Distribution, and Productivity in Casco Bay. [Report BRI 2013-08 submitted to The Casco Bay Estuary Partnership, Portland, Maine]. Gorham, ME: Biodiversity Research Institute.