Map of Hudson Bay lowlands, world's third largest wetland.

Hudson Bay Lowlands

Third Largest Wetland in the World*

The Lowlands is composed mostly of muskeg or peatlands (grouped by biologists into bogs and fens), and dotted with ponds, lakes and streams. The drier areas are broken up by stands of balsam poplar, aspen, white spruce and balsam fir and in the muskeg by black spruce and tamarack.


A wetland is an area where water is the controlling environmental factor. It occurs where the water table is at or near the land surface, or where shallow water covers the land.

*World's Largest Wetlands

1.  West Siberian Lowlands (Russia)

2.  Amazon River floodplain

3.  Hudson Bay Lowlands

4   Pantanal (Brazil, Paraguay and Bolivia along Paraguay River)

From Wetland Ecology by Paul Keddy


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