Diet Overlap

Bubo virginianus (Great Horned Owl)
Aegolius acadicus (Northern Saw-whet Owl)

Common Diet

Blarina brevicauda (Northern Short-tailed Shrew)
Microtus montanus (montane vole)
Microtus pennsylvanicus (meadow vole)
Neurotrichus gibbsii (Shrew-mole)
Peromyscus maniculatus (deer mouse)
Sorex vagrans (Vagrant Shrew)

Common Habitat

Acadia National Park
Alaska-St. Elias Range tundra
Alberta Mountain forests
Alberta-British Columbia foothills forests
Allegheny Highlands forests
Apostle Islands National Lakeshore
Appalachian mixed mesophytic forests
Appalachian-Blue Ridge forests
Arizona Mountains forests
Atlantic coastal pine barrens
Bandelier National Monument
Banff National Park
Big Bend Biosphere Reserve
Bighorn Canyon National Recreation Area
Black Canyon of the Gunnison National Park
Blackwater National Wildlife Refuge
Blue Mountains forests
Boggs Lake Preserve
Bombay Hook National Wildlife Refuge
British Columbia mainland coastal forests
Bruce Peninsula National Park
California Central Valley grasslands
California coastal sage and chaparral
California Floristic Province
California interior chaparral and woodlands
California montane chaparral and woodlands
Canadian Aspen forests and parklands
Cape Breton Highlands National Park
Cape Cod National Seashore
Cape Hatteras National Seashore
Cape Romain National Wildlife Refuge
Capulin Volcano National Monument
Carolinian-South Atlantic Biosphere Reserve
Cascade Mountains leeward forests
Cedar Breaks National Monument
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 Plains Biosphere Reserve
Central tall grasslands
Central U.S. hardwood forests
Champlain-Adirondack Biosphere Reserve
Channel Islands National Marine Sanctuary
Channel Islands National Park
Chattahoochee River National Recreation Area
Chesapeake & Ohio Canal National Hist. Park
Chihuahuan desert
Chiricahua National Monument
Colorado National Monument
Colorado Plateau shrublands
Colorado Rockies forests
Crater Lake National Park
Craters of the Moon National Monument
Crosswinds Marsh
Cuyahoga Valley National Park
Death Valley National Park
Deer Flat National Wildlife Refuge
East Central Texas forests
Eastern Canadian Shield taiga
Eastern Cascades forests
Eastern forest-boreal transition
Eastern Great Lakes lowland forests
Edwards Plateau savanna
Edwin S. George Reserve
Effigy Mounds National Monument
El Malpais National Monument
Elk Island National Park
Fathom Five National Marine Park
Flint Hills tall grasslands
Forillon National Park
Fort Pulaski National Monument
Fraser Biosphere Reserve
Fraser Plateau and Basin complex
Friendship Hill National Historic Site
Fundy National Park
Gateway National Recreation Area
George Washington Memorial Parkway
Georgian Bay Islands National Park
Gettysburg National Military Park
Glacier National Park
Grand Canyon National Park
Grandfather Mountain
Great Basin montane forests
Great Basin National Park
Great Basin shrub steppe
Great Smoky Mountains National Park
Greenwater Provincial Park
Guadalupe Mountains National Park
Gulf of St. Lawrence lowland forests
H.J. Andrews Biosphere Reserve
Jasper National Park
Joshua Tree National Park
Kejimkujik National Park
Klamath-Siskiyou forests
Kootenay National Park
Kouchibouguac National Park
La Mauricie National Park
Lake Superior Provincial Park
Landels-Hill Big Creek Preserve
Lassen Volcanic National Park
Lava Beds National Monument
Long Point Biosphere Reserve
Madrean Pine-Oak Woodlands
Mesa Verde National Park
Middle Atlantic coastal forests
Midwestern Canadian Shield forests
Mississippi lowland forests
Mojave and Colorado Deserts Biosphere Reserve
Mojave desert
Montana Valley and Foothill grasslands
Morristown National Historical Park
Mount Rainier National Park
Mount Revelstoke National Park
Mount Tamalpais State Park
Muir Woods National Monument
Navajo National Monument
Nebraska Sand Hills mixed grasslands
New England-Acadian forests
New Jersey Pinelands Biosphere Reserve
Nez Perce National Historical Park
Niagara Escarpment Biosphere Reserve
North America
North Central Rockies forests
Northeastern coastal forests
Northern California coastal forests
Northern mixed grasslands
Northern Pacific coastal forests
Northern short grasslands
Northern tall grasslands
Northern transitional alpine forests
Oak Ridge National Environmental Research Park
Okanagan dry forests
Olympic Biosphere Reserve
Oregon Caves National Monument
Ozark Mountain forests
Ozark National Scenic Riverways
Pacific Coastal Mountain icefields and tundra
Pacific Rim National Park Reserve
Palouse grasslands
Pictured Rocks National Lakeshore
Pinnacles National Monument
Point Pelee National Park
Point Reyes National Seashore
Prince Albert National Park
Prince Edward Island National Park
Puget lowland forests
Pukaskwa National Park
Queen Charlotte Islands
Redwood National Park
Reserva de la Biosfera Sierra Gorda
Reserva de la Michilia
Richmond National Battlefield Park
Riding Mountain Biosphere Reserve
Rocky Mountain Biosphere Reserve
Rondeau Provincial Park
Saguaro National Park
Saint Croix International Historic Site
Saint Lawrence Islands National Park
Samuel P. Taylor State Park
San Dimas Biosphere Reserve
San Juan Island National Historical Park
Santa Cruz Island Preserve
Sequoia and Kings Canyon Biosphere Reserve
Sevilleta LTER Site
Shortgrass Steppe LTER Site
Sierra Madre de Oaxaca pine-oak forests
Sierra Madre Occidental pine-oak forests
Sierra Madre Oriental pine-oak forests
Sierra Nevada forests
Sleeping Bear Dunes National Lakeshore
Snake-Columbia shrub steppe
South Atlantic Coastal Plain Biosphere Reserve
South Central Rockies forests
Southeastern mixed forests
Southern Appalachian Biosphere Reserve
Southern Great Lakes forests
Southern Hudson Bay taiga
Southwest Nova Biosphere Reserve
Sunset Crater Volcano National Monument
Tamaulipan mezquital
Tawas Point State Park
Texas blackland prairies
Trans-Mexican Volcanic Belt pine-oak forests
Upper Midwest forest-savanna transition
Upper Miss. River Nat'l Wildlife Refuge
Virginia Coast Biosphere Reserve
Voyageurs National Park
Wasatch and Uinta montane forests
Waterton Biosphere Reserve
Western Great Lakes forests
Western short grasslands
Whiskey-Shasta-Trinity National Recreation Area
Willamette Valley forests
Wind Cave National Park
Wupatki National Monument
Wyoming Basin shrub steppe
Yellowstone Biosphere Reserve
Yosemite National Park
Zion National Park

Attributes / relations provided by
♦ 1Blarina brevicauda, Sarah B. George, Jerry R. Choate, and Hugh H. Genoways, MAMMALIAN SPECIES No. 261, pp. 1-9 (1986)
♦ 2DIET OF NORTHERN SAW-WHET OWLS IN SOUTHERN WISCONSIN, SCOTT R. SWENGEL AND ANN B. SWENGEL, The Condor 94:707-711 (1992)
♦ 3Microtus montanus, Wendy E. Sera and Cathleen N. Early, MAMMALIAN SPECIES No. 716, pp. 1–10 (2003)
♦ 4DIETS OF NORTHERN PYGMY-OWLS AND NORTHERN SAW-WHET OWLS IN WEST-CENTRAL MONTANA, DENVER W. HOLT AND LESLIE A. LEROUX, Wilson Bull., 108(1), 1996, pp. 123-128
♦ 5DIET OF THE GREAT HORNED OWL IN THE CRESTON VALLEY, BRITISH COLUMBIA, 1998 - 2005, Linda M. Van Damme, Wildlife Afield 2:2 December 2005, pp. 73-78
♦ 6Neurotrichus gibbsii, L. N. Carraway and B. J. Verts, MAMMALIAN SPECIES No. 387, pp. 1-7 (1991)
♦ 7Sorex vagrans, Scott W. Gillihan and Kerry R. Foresman, MAMMALIAN SPECIES No. 744, pp. 1–5 (2004)