Central Canadian Shield forests
This ecoregion consists of rolling hills, lakes, bogs and rocky outcrops covering a large curved swathe on the Canadian Shield from eastern Manitoba and Northern Ontario running southeastwards through Thunder Bay District to the north shore of Lake Superior and then northeastwards into western Quebec. The area has a cool climate with summer temperatures averaging around 13°C dropping to a very cold -17°C in winter, with the hills around Lac Seul in northwestern Ontario being warmer and wetter than most of the area. Average rainfall in the eastern side of the ecoregion is 550mm per year, rising to 750mm in the centre (near Lake Nipigon for example), up to 900mm in the west. Specific areas include Lake Nipigon and Big Trout Lake (Ontario). These forest contrast with more severe boreal forest ecoregions such as the Eastern Canadian Shield taiga to the north, which covers most of Northern Quebec and Labrador.
Manitoba
Two sections of the province are not dominated by forest. The province's northeast corner bordering Hudson Bay is above the treeline and is considered tundra. The tallgrass prairie once dominated the south central and southeastern parts including the Red River Valley. Mixed grass prairie is found in the southwestern region. Agriculture has replaced much of the natural prairie but prairie still can be found in parks and protected areas; some are notable for the presence of the endangered western prairie fringed orchid.