Ursus arctos (Grizzly Bear; Brown Bear)

Diet Overlap

Competing SpeciesCommon Prey Count
Acanthis flammea (Common Redpoll)1
Accipiter gentilis (Northern Goshawk)4
Accipiter nisus (Eurasian Sparrowhawk)1
Accipiter striatus (Sharp-shinned Hawk)1
Aegolius funereus (Boreal Owl)1
Alces alces (moose)5
Ambystoma maculatum (Spotted Salamander)1
Anaxyrus americanus (American Toad)1
Anthophora abrupta (miner bee)1
Apis mellifera (honey bee)1
Aporia crataegi (Black-veined White Butterfly)1
Aquila chrysaetos (Golden Eagle)8
Archilochus colubris (Ruby-throated Hummingbird)1
Ardea herodias (Great Blue Heron)1
Asio otus (Long-eared Owl)1
Athene cunicularia (Burrowing Owl)1
Athene noctua (Little Owl)1
Baeolophus bicolor (Tufted Titmouse)1
Bison bonasus (European bison)2
Bombus hortorum (Small Garden Humble-bee)1
Bombus jonellus (Heath Humble-bee)1
Bombus lapidarius (Stone Humble-bee)1
Bombus lucorum (White-tailed bumblebee)1
Bombus pascuorum (Common Carder-bee)1
Bombus polaris (Bumblebee)4
Bombus pratorum (Early-nesting Humble-bee)1
Bombus rupestris (Hill Cuckoo-bee)1
Bonasa umbellus (Ruffed Grouse)6
Branta hutchinsii (Cackling Goose)2
Brenthis ino (Lesser Marbled Fritillary)1
Bromius obscurus (Western Grape Rootworm)1
Bubo bubo (Eurasian Eagle-Owl)1
Bubo virginianus (Great Horned Owl)1
Buteo jamaicensis (Red-tailed Hawk)1
Buteo lagopus (Rough-legged Hawk)3
Calcarius lapponicus (Lapland Longspur)1
Calidris mauri (Western Sandpiper)1
Calidris tenuirostris (Great Knot)3
Callorhinus ursinus (Northern Fur Seal)1
Canis latrans (Coyote)6
Canis lupus (Wolf)13
Carpodacus sipahi (Scarlet Finch)1
Carterocephalus palaemon (Arctic skipper)1
Catharus ustulatus (Swainson's Thrush)2
Cerorhinca monocerata (Rhinoceros Auklet)1
Cervus elaphus (wapiti or elk)4
Charadrius vociferus (Killdeer)1
Chionomys nivalis (European snow vole)1
Circus cyaneus (Northern Harrier)1
Clossiana freija (Freija Fritillary)1
Corvus corax (Northern Raven)4
Cuon alpinus (Dhole)1
Dryobates pubescens gairdnerii (Downy Woodpecker)1
Eptesicus fuscus (big brown bat)1
Eurycea guttolineata (Three-lined Salamander)1
Falcipennis canadensis (Spruce Grouse)1
Falcipennis canadensis franklinii (Franklin’s Grouse)1
Falco rusticolus (Gyrfalcon)2
Falco sparverius (American Kestrel)1
Felis silvestris (Wildcat)1
Gavia immer (Great Northern Loon)1
Gulo gulo (Wolverine)5
Gypaetus barbatus (Bearded Vulture)1
Haliaeetus albicilla (White-tailed Eagle)1
Haliaeetus leucocephalus (Bald Eagle)1
Lagopus lagopus (Willow Ptarmigan)4
Lagopus leucura (White-tailed Ptarmigan)1
Lagopus muta (Rock Ptarmigan)1
Lamna ditropis (Salmon shark)1
Lanius excubitor (Northern Shrike)1
Larus schistisagus (Slaty-backed Gull)1
Lemmus sibiricus (brown lemming)3
Leptopterna ferrugata1
Lepus americanus (Snowshoe Hare)2
Lepus othus (Alaskan Hare)1
Limosa haemastica (Hudsonian Godwit)1
Lithobates sylvaticus (Wood Frog)1
Lontra canadensis (northern river otter)1
Lygocoris pabulinus (Common Green Capsid)2
Lygus rugulipennis1
Lynx canadensis (lynx)4
Lynx lynx (Eurasian Lynx)3
Lynx pardinus (Iberian Lynx)1
Lynx rufus (Bobcat)1
Lyrurus tetrix (Eurasian Black Grouse)1
Marmota caligata (hoary marmot)3
Marmota olympus (Olympic marmot)1
Martes americana (American Marten)10
Martes flavigula (Yellow-throated Marten)1
Martes foina (Beech Marten)1
Martes martes (European Pine Marten)1
Martes zibellina (Sable)2
Megaceryle alcyon (Belted Kingfisher)1
Meleagris gallopavo (Wild Turkey)1
Mephitis mephitis (Striped Skunk)1
Mergus merganser (Common Merganser)1
Microtus oeconomus (tundra vole)1
Microtus townsendii (Townsend's vole)1
Microtus xanthognathus (taiga vole)1
Mustela erminea (Ermine)2
Mustela frenata (Long-tailed Weasel)1
Mustela nivalis (Least Weasel)3
Myodes rufocanus (gray red-backed vole)5
Myodes rutilus (northern red-backed vole)7
Naemorhedus goral (goral)1
Numenius tahitiensis (Bristle-thighed Curlew)4
Ochotona collaris (Collared Pika)2
Ochotona princeps (pika)1
Odocoileus hemionus (mule deer)1
Orcinus orca (Killer Whale)1
Oreamnos americanus (mountain goat)1
Oriolus oriolus (Eurasian Golden Oriole)1
Ovibos moschatus (muskox)1
Ovis canadensis (bighorn sheep)2
Ovis dalli (Dall's sheep)2
Pandion haliaetus (Osprey)1
Panthera tigris (Tiger)1
Phalacrocorax auritus (Double-crested Cormorant)1
Phenacomys intermedius (western heather vole)2
Phenacomys ungava (eastern heather vole)3
Pieris napi (Green-veined White Butterfly)1
Pinicola enucleator (Pine Grosbeak)2
Pituophis catenifer (Gopher Snake)1
Plethodon cinereus (Eastern Red-backed Salamander)1
Pluvialis fulva (Pacific Golden-Plover)1
Podiceps nigricollis (Eared Grebe)1
Poecile carolinensis (Carolina Chickadee)1
Poecile hudsonicus (Boreal Chickadee)4
Polygonia c-album (Comma Butterfly)1
Pseudacris crucifer (Spring Peeper)1
Puma concolor (Cougar)3
Rattus rattus (black rat)1
Scalopus aquaticus (Eastern Mole)1
Sitta carolinensis (White-breasted Nuthatch)1
Stercorarius longicaudus (Long-tailed Jaeger)1
Stercorarius pomarinus (Pomarine Skua)1
Strix aluco (Tawny Owl)1
Strix nebulosa (Great Grey Owl)4
Surnia ulula (Northern Hawk-Owl)1
Sus scrofa (wild boar)1
Sylvilagus audubonii (Desert Cottontail)1
Tamias dorsalis (cliff chipmunk)1
Tamias minimus (least chipmunk)1
Tamias ruficaudus (red-tailed chipmunk)2
Tamias townsendii (Townsend's chipmunk)1
Tamiasciurus hudsonicus (red squirrel)1
Taxidea taxus (American Badger)1
Tetrao urogallus (Western Capercaillie)2
Tetrastes bonasia (Hazel Grouse)1
Thomomys talpoides (northern pocket gopher)1
Thryothorus ludovicianus (Carolina Wren)1
Tyto alba (Barn Owl)1
Urocitellus columbianus (Columbian ground squirrel)2
Urocitellus parryii (Arctic ground squirrel)2
Ursus americanus (black bear)14
Vipera berus (Adder, Northern Viper)1
Vulpes lagopus (Arctic Fox)3
Vulpes vulpes (Red Fox)10
Zamenis longissimus (Aesculapean Snake)1
Zonotrichia leucophrys (White-crowned Sparrow)2