The Ontario Ministry of Natural Resources (MNR) and the Nature Conservancy of Canada collaborated on the Conservation Blueprint for Biodiversity, a shared vision for natural heritage conservation in the Great Lakes region. The Conservation Blueprint assembles, catalogues, classifies, maps and analyzes the aquatic and terrestrial biodiversity in the Great Lakes region, and identifies high quality aquatic and terrestrial areas that can support a broad range of natural biodiversity. Summary reports of the tertiary watersheds and eco-districts include data and maps.