CMCC-JUNE 12th 2012.pics of Monarch butterfly on common milkweed plant. Horticulturalist Colleen Cir

CMCC-JUNE 12th 2012.pics of Monarch butterfly on common milkweed plant. Horticulturalist Colleen Cirillo of the Toronto and Region Conservation Autority takes us on a tour of High Park to show the damage that non native species like English Ivy,periwinkle and dogwood maple can do to their environment in the park and perhaps in your garden as some of these are sold at your local garden store. (Photo by Colin McConnell/Toronto Star via Getty Images)