Bird Conservation Region 7

Taiga Shield and Hudson Plains

This BCR includes the Hudson Plains—the largest extensive area of wetlands in the world—and extends east and west onto the Canadian Shield. The subarctic climate is characterized by relatively short, cool summers with prolonged periods of daylight and long, very cold winters. The poorly drained areas of the Hudson Plains support dense sedge-moss-lichen covers, with open woodlands of black spruce and tamarack in better-drained sites. Coastal marshes and extensive tidal flats are present along the coastline. The Canadian Shield is characterized in upland sites and along rivers by open, mixed-wood forests of white spruce, balsam fir, trembling aspen, balsam poplar, and white birch. Further north, approaching the limit of tree growth, stunted black spruce and jack pine dominate, accompanied by alder, willow, and tamarack in the fens and bogs. Thousands of lakes and wetlands occur in glacially carved depressions, and peat-covered lowlands are commonly waterlogged or wet for prolonged periods due to discontinuous but widespread permafrost. The abundance of water provides an important habitat for breeding waterfowl. Representative birds include Black Scoter, Whimbrel, Rock and Willow Ptarmigan, Gray-cheeked Thrush, American Tree Sparrow, Short-billed Dowitcher, Common Redpoll, Harris’ Sparrow, Northern Shrike, Blackpoll Warbler, Fox Sparrow, and Rough-legged Hawk. The coasts of Hudson and James Bay provide critical shorebird staging habitat, funneling millions of birds southwards during fall migration.

Bird Conservation Plans
Landbirds -

Shorebirds - Northern Conservation Division (CN), Ontario, Prairie Canada
Waterbirds - Canada Region
Waterfowl -

Joint Venture areas: Eastern Habitat, Prairie Habitat

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Note: Hawaii (not shown) is BCR 67

Gulf Coastal Prairie Tamaulipan Brushlands Chihuahuan Desert Sierra Madre Occidental Sonoran and Mojave Deserts Coastal California Peninsular Florida New England/MidAtlantic Coasts Piedmont Appalachian Mountains Southeastern Coastal Plain Mississippi Alluvial Valley West Gulf Coastal Plain/Ouachitas Central Hardwoods Prairie Hardwood Transition Eastern Tallgrass Prairie Oaks and Prairies Edwards Plateau Central Mixed Grass Prairie Shortgrass Prairie Badlands and Prairies Southern Rockies Colorado Plateau Sierra Nevada Atlantic Northern Forests Lower Great Lakes/St.Lawrence Plain Boreal Hardwood Transition Prairie Potholes Northern Rockies Great Basin Boreal Softwood Shield Taiga Shield and Hudson Plains Boreal Taiga Plains Northern Pacific Rainforest Northwestern Interior Forest Arctic Plains and Mountains Western Alaska Aleutian/Bering Sea Islands