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Mammals of Oregon

The mammals most often spotted in Oregon, ranked by recent research-grade observations.

91,091
recent observations
50
species listed
50
mammals

Naturalists have logged 91,091 research-grade observations across the 50 most-recorded species in Oregon. The most frequently seen is the Mule Deer, with 17,140 recorded sightings.

Rarer finds confirmed in Oregon include Bobcat - uncommon enough that a sighting is worth logging.

Bobcat

Most-observed mammals in Oregon

Mule Deer
Odocoileus hemionus
17,140 observations
Wapiti
Cervus canadensis
5,379 observations
Coypu
Myocastor coypus
4,283 observations
Eastern Gray Squirrel
Sciurus carolinensis
4,151 observations
Douglas's Squirrel
Tamiasciurus douglasii
3,711 observations
Douglas's Ground Squirrel
Otospermophilus douglasii
3,521 observations
Coyote
Canis latrans
3,480 observations
Eastern Fox Squirrel
Sciurus niger
3,315 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
3,129 observations
Common Raccoon
Procyon lotor
3,029 observations
American Beaver
Castor canadensis
2,753 observations
North American Porcupine
Erethizon dorsatum
2,621 observations
Townsend's Chipmunk
Neotamias townsendii
2,592 observations
Harbor Seal
Phoca vitulina
2,449 observations
Western Gray Squirrel
Sciurus griseus
2,026 observations
American Black Bear
Ursus americanus
1,892 observations
California Sea Lion
Zalophus californianus
1,569 observations
White-tailed Deer
Odocoileus virginianus
1,363 observations
North American River Otter
Lontra canadensis
1,354 observations
Yellow-bellied Marmot
Marmota flaviventris
1,309 observations
Pronghorn
Antilocapra americana
1,298 observations
Belding's Ground Squirrel
Urocitellus beldingi
1,296 observations
Bobcat
Lynx rufus
1,277 observations
Bushy-tailed Woodrat
Neotoma cinerea
1,122 observations
Striped Skunk
Mephitis mephitis
1,111 observations
American Pika
Ochotona princeps
1,104 observations
Brush Rabbit
Sylvilagus bachmani
911 observations
Virginia Opossum
Didelphis virginiana
888 observations
Mountain Cottontail
Sylvilagus nuttallii
841 observations
Domestic Cat
Felis catus
804 observations
Steller Sea Lion
Eumetopias jubatus
801 observations
Muskrat
Ondatra zibethicus
799 observations
Eastern Cottontail
Sylvilagus floridanus
708 observations
Western Deer Mouse
Peromyscus sonoriensis
665 observations
American Mink
Neogale vison
538 observations
Mountain Lion
Puma concolor
511 observations
Bighorn Sheep
Ovis canadensis
508 observations
Gray Fox
Urocyon cinereoargenteus
502 observations
Grey Whale
Eschrichtius robustus
499 observations
Black-tailed Jackrabbit
Lepus californicus
488 observations
Red Fox
Vulpes vulpes
459 observations
European Rabbit
Oryctolagus cuniculus
443 observations
Mountain Goat
Oreamnos americanus
405 observations
Snowshoe Hare
Lepus americanus
333 observations
American Badger
Taxidea taxus
317 observations
Long-tailed Weasel
Neogale frenata
300 observations · iNaturalist
American Shrewmole
Neurotrichus gibbsii
295 observations
Black Rat
Rattus rattus
276 observations
Columbian Ground Squirrel
Urocitellus columbianus
265 observations
Domestic Horse
Equus caballus
261 observations

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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