The Invasive Species Centre is a not-for-profit, partnership-based organization created in 2011 to be a leader in coordinating invasive species efforts in Ontario, Canada and the Great Lakes Basin with a focus on natural environments such as lakes and forests

Learn how invasive species threaten Ontario’s biodiversity and what the province is doing to prevent and control their spread.

Alien species (insects, micro-organisms and plants) are species found outside of their natural range. They can be pests, diseases, insects or weeds. Other alien species are competitors of indigenous species rather than pests. They do not cause damage to trees and plants, but they do change the natural biological diversity of local ecosystems by crowding out indigenous species.

An aquatic invader is a non-native species, whose introduction will likely cause (or has already caused) damage to the host ecosystem, existing species therein, the economy or human well-being. Invasive species thrive in the absence of their native predators and have the potential to drastically alter habitat, rendering it inhospitable for native species.

The Canadian Wildlife Federation is dedicated to ensuring an appreciation of our natural world and a lasting legacy of healthy wildlife and habitat.

From parasites to crabs and living slime affectionately dubbed "rock snot," invasive species can wreak havoc when introduced into a new habitat.

With thousands of different plants and animals, Canada is a country rich in biodiversity. But did you know that not all of these species are native to the habitats in which they live? Some of them come from other parts of the country or the world often having hitched a ride with human travelers, in cargo, on the bottom of boats and in the ballast of ships.

Canada is being invaded by aliens, but not by the type you see in science fiction movies. These organisms are found nearly everywhere in Canada. They can belong to any of the categories of organisms in the world, including plants, mammals, birds, reptiles, amphibians, invertebrates, and micro-organisms.