Diet Overlap

Pinicola enucleator (Pine Grosbeak) Castor canadensis (american beaver)

Common Diet

Populus tremuloides (quaking aspen) Salix alaxensis (feltleaf willow)

Common Habitat

Acadia National Park Alaska Peninsula montane taiga Alaska-St. Elias Range tundra Alberta Mountain forests Alberta-British Columbia foothills forests Algonquin Provincial Park Allegheny Highlands forests Arctic National Wildlife Refuge Atlantic coastal pine barrens Audubon National Wildlife Refuge Bandelier National Monument Banff National Park Beringia lowland tundra Beringia upland tundra Bighorn Canyon National Recreation Area Black Canyon of the Gunnison National Park Bonanza Creek LTER Site British Columbia mainland coastal forests Bruce Peninsula National Park California Central Valley grasslands California Floristic Province Canadian Aspen forests and parklands Canyonlands National Park Cape Breton Highlands National Park Capital Reef National Park Cascade Mountains leeward forests Cedar Creek LTER Site Central and Southern Cascades forests Central and Southern mixed grasslands Central British Columbia Mountain forests Central Canadian Shield forests Central forest-grasslands transition Central Pacific coastal forests Central tall grasslands Chihuahuan desert Colorado Plateau shrublands Colorado Rockies forests Cook Inlet taiga Copper Plateau taiga Denali Biosphere Reserve Devils Tower National Monument Dinosaur National Monument Eastern Canadian forests Eastern Canadian Shield taiga Eastern forest-boreal transition Eastern Great Lakes lowland forests Effigy Mounds National Monument Elk Island National Park Fathom Five National Marine Park Flint Hills tall grasslands Fraser Biosphere Reserve Fraser Plateau and Basin complex Fundy National Park Georgian Bay Islands National Park Glacier Bay National Park and Preserve Glacier National Park Grand Canyon National Park Grand Teton National Park Grasslands National Park Great Basin National Park Great Basin shrub steppe Greenwater Provincial Park Gros Morne National Park Gulf of St. Lawrence lowland forests H.J. Andrews Biosphere Reserve Hubbard Brook Biosphere Reserve Interior Alaska-Yukon lowland taiga Interior Yukon-Alaska alpine tundra Ivvavik National Park Jasper National Park Kejimkujik National Park Kluane National Park and Reserve Knife River Indian Villages National Hist. Site Kootenay National Park Kouchibouguac National Park La Mauricie National Park Lake Roosevelt National Recreation Area Lake Superior Provincial Park Lassen Volcanic National Park Mid-Continental Canadian forests Midwestern Canadian Shield forests Mingan Archipelago National Park Reserve Mojave desert Montana Valley and Foothill grasslands Morristown National Historical Park Mount Arrowsmith Mount Rainier National Park Mount Revelstoke National Park Muskwa-Slave Lake forests Nahanni National Park Reserve Nebraska Sand Hills mixed grasslands New England-Acadian forests Niagara Escarpment Biosphere Reserve North America North Central Rockies forests Northeastern coastal forests Northern Canadian Shield taiga Northern Cordillera forests Northern mixed grasslands Northern Pacific coastal forests Northern short grasslands Northern tall grasslands Northern transitional alpine forests Northwest Territories taiga Ogilvie-MacKenzie alpine tundra Okanagan dry forests Olympic Biosphere Reserve Pacific Coastal Mountain icefields and tundra Pacific Rim National Park Reserve Palouse grasslands Prince Albert National Park Prince Edward Island National Park Puget lowland forests Pukaskwa National Park Redberry Lake Biosphere Reserve Reserve de la Biosphere de Charlevoix Riding Mountain Biosphere Reserve Rocky Mountain Biosphere Reserve Rondeau Provincial Park Saint Lawrence Islands National Park Saratoga National Historical Park Sequoia and Kings Canyon Biosphere Reserve Shortgrass Steppe LTER Site Sleeping Bear Dunes National Lakeshore Snake-Columbia shrub steppe South Central Rockies forests Southeastern conifer forests Southern Great Lakes forests Southern Hudson Bay taiga Southwest Nova Biosphere Reserve Tamaulipan mezquital Terra Nova National Park Upper Midwest forest-savanna transition Upper Miss. River Nat'l Wildlife Refuge Voyageurs National Park Vuntut National Park Wapusk National Park Wasatch and Uinta montane forests Waterton Biosphere Reserve Western Great Lakes forests Western short grasslands Willamette Valley forests Wood Buffalo National Park Wrangell-St. Elias National Park and Preserve Wyoming Basin shrub steppe Yoho National Park Yukon Interior dry forests