was also used as a tool to ecologically assess the master plan for the Rouge Park Trails. A sensitivity analysis was done for the park, which involved plotting the location of rare plant and animal species, identifying wetlands and other sensitive habitats, and important nesting and breeding areas for wildlife. The mapping process involved the use of geo-referenced ecological data from sources like MNR, TRCA and Rouge Park to be mapped onto digital aerial photos of Rouge Park so that specific locations of sensitive species and habitats could be determined. The data that was mapped includes flora and fauna occurrences, provincially and locally significant wetlands, vegetation communities, Environmentally significant areas (ESAs) and interior forest habitat. The David Suzuki Foundation has also used GIS and spatial analysis to map the value of natural capital in the Rouge National Park. The foundation mapped the distribution of land cover and land use in the Rouge Park and the surrounding watersheds, as well as the average ecosystem service value per hectare by land cover type. The data was from the 2000-2002 Southern Ontario Land Resource Information System (SOLRIS). Biodiversity and wildlife This urban park features numerous fauna such as white-tailed deer, mice, opossums, raccoons, hawks, coyotes, skunks, ducks, beaver, bald eagles, bears, shrews, red foxes, turkeys, weasels, golden eagles, river otters, kestrels, moles, swans, minks, bats, woodchucks, and porcupines. The park has over 1,700 species of plants, animals and fungi, as verified in the 2012 and 2013 Ontario BioBlitz surveys. 1006 plant species, including 6 which are nationally rare and 92 which are regionally rare. 261 bird species, 5 of which are nationally rare breeding birds and 4 other breeding birds of special concern as well as numerous locally rare, area-sensitive raptor and colonial birds 65 fish species, 2 of which are nationally vulnerable 40 mammal species, some are locally rare 21 reptile and amphibian species, some are locally rare Physical geography Rouge National Urban Park is located in the Rouge River, Petticoat Creek and Duffins Creek watersheds. The Rouge River remains the healthiest river that flows through the City of Toronto. The ravine system that surrounds the Rouge River forms a part of the larger Toronto ravine system; which also includes the ravines surrounding the other rivers and creeks in the city. Artificial wetlands The created wetlands within the Rouge Park watershed serve ecological benefits like providing a reduction in flood force, a