What are invasive species?
Invasive species are plants, animals, and micro-organisms that are found outside of their natural range, and whose presence poses a threat to environmental health, the economy, or society, including human health (Government of Canada, 2004).

Invasive species in Ontario include terrestrial and aquatic plants, forest pests, invertebrates, and fish. These foreign species are harmful to our ecosystems. Explore the resources to learn how you can help.