Southern Ontario
Southern Ontario has a very different climate from the rest of the country. It is the only area of Canada that has Carolinian forest. Many trees, plants, and wildlife in Southern Ontario are not found anywhere else in Canada. Some rare trees to Canada in this region include the tulip tree, pawpaw fruit tree and the cucumber tree. The Carolinian forests of Southern Ontario have in large part been destroyed by development sprawl. Very few original growth areas remain.
Quebec City–Windsor Corridor
Because of the moderating influence of the Great Lakes and the frequent influx of warm, moist air from the Gulf of Mexico, the corridor—particularly the western half—has a markedly warmer climate than the rest of central Canada. The rich soil and the warm climate mean that the flora and fauna in the corridor are similar to those in the deciduous forests of the eastern United States as far south as Virginia, rather than the evergreen boreal forest that covers most of central Canada up to the Arctic. The forest in southwestern Ontario is often referred to as Carolinian forest.