The Animals Of Oregon

Section 01

Rainforest And Desert In The Same State

Oregon is split by a wall. The Cascade Range runs north to south through the state, and it intercepts Pacific moisture so effectively that the west side receives up to 200 inches of rain a year in the Coast Range while parts of the southeast get under ten. Few states contain a sharper ecological boundary, and Oregon's wildlife divides almost entirely along it.

West of the Cascades is temperate rainforest: Douglas fir, western hemlock, and Sitka spruce, with some of the highest biomass per acre of any forest on Earth. That forest supports Roosevelt elk, northern spotted owl, marbled murrelet, and a salamander fauna that includes species found in only a few drainages.

East of the Cascades is the northern Great Basin and Columbia Plateau: sagebrush steppe, juniper, and lava. Pronghorn, greater sage-grouse, kit fox, and bighorn sheep live there, and the fauna is closer to Nevada's than to the coast a couple of hundred miles away.

The Columbia River ties the state to a much larger story. Oregon's salmon runs once numbered in the many millions, and the sequence of dams built through the 20th century for power and navigation reduced them severely. Oregon is also where some of the largest dam removals in history have happened, on the Elwha in neighbouring Washington and more recently on the Klamath, where four dams came out in a project that reopened hundreds of miles of habitat.

Section 02

Oregon's Official State Animals

Oregon is also one of only a handful of states with an official microbe. Brewer's yeast was designated in 2013 in recognition of the state's craft brewing industry, which drew some mockery at the time but makes Oregon the first state to formally honour a microorganism.

Section 03

Habitats By Region, And Who Lives In Each

1. Coast Range and coastal rainforest

Sitka spruce, western hemlock, and Douglas fir with extremely high rainfall. Roosevelt elk, the largest elk subspecies, live here in dense herds. Also marbled murrelet, which nests high in old-growth canopy and flies to sea to feed, plus northern spotted owl, Pacific giant salamander, and coastal cutthroat trout. Related: orca vs Roosevelt elk.

2. The coast and offshore

Rocky headlands, estuaries, and offshore rocks that are almost all protected as wildlife refuge. Common murres nest in enormous colonies, along with tufted puffins, pigeon guillemots, and cormorants. Sea lions and Steller sea lions haul out, harbour seals pup in estuaries, and gray whales migrate past twice a year with a resident summer group feeding off the central coast. Sea otters were extirpated from Oregon and have not been restored. Related: sea otter facts and kelp forest.

3. Willamette Valley

The state's population centre, historically oak savanna and wet prairie maintained by indigenous burning, now farmland and cities. Fender's blue butterfly and Oregon chub survive in fragments, and the valley's remaining wet prairie supports streaked horned lark and dusky Canada geese wintering from Alaska.

4. Cascade Range

Volcanic peaks, mixed conifer, and high lakes including Crater Lake, the deepest in the United States. Black bear, bobcat, mountain lion, wolverine in very small numbers, Cascades frog, and Clark's nutcracker. See Crater Lake National Park.

5. Blue Mountains and northeast

Ponderosa and mixed conifer over folded ranges, including the Wallowas and Hells Canyon. This is Oregon's gray wolf country, plus Rocky Mountain elk, bighorn sheep, and moose which colonised the far northeast corner naturally in recent decades.

6. High desert and Great Basin, southeast

Sagebrush steppe, juniper, alkali lakes, and fault-block ranges like Steens Mountain. Greater sage-grouse, pronghorn, kit fox, pygmy rabbit, California bighorn, and desert-adapted reptiles. Malheur National Wildlife Refuge is a critical Pacific Flyway wetland in the middle of dry country, holding vast numbers of migrating waterfowl and shorebirds.

Section 04

Salmon, Dams, And The Columbia

Chinook salmon is Oregon's state fish, and salmon shape more of the state's ecology, economy, and politics than any other animal.

Five Pacific salmon species plus steelhead return to Oregon rivers. They hatch in freshwater, migrate to the ocean, spend one to several years at sea, and return to spawn in the gravel where they hatched, then die. That death is ecologically central: their carcasses deliver marine nitrogen inland, feeding bears, eagles, otters, insects, and the forest itself.

The Columbia River system once produced somewhere between 10 and 16 million adult salmon a year. Dams built through the 20th century for hydropower, navigation, and irrigation blocked or degraded most of that. Grand Coulee Dam, completed in 1942 with no fish passage at all, permanently cut off over a thousand miles of upstream habitat. Returns now run at a small fraction of historic levels, and many runs are federally listed.

The Klamath is the counterweight. Four dams on the Klamath River were removed in the largest dam removal project in history, completed in 2024, reopening hundreds of miles of habitat to salmon and steelhead for the first time in a century. Fish were documented moving into newly accessible reaches within weeks. Related: rivers where salmon returned after the dams came down.

Section 05

Mammals Of Oregon

• Roosevelt and Rocky Mountain elk: Roosevelt elk west of the Cascades are the largest-bodied elk subspecies, and Rocky Mountain elk occupy the northeast. Oregon holds well over 100,000 elk in total. Related: where to watch the elk rut.
• Black bear: roughly 25,000 to 30,000, mostly in forested western and northeastern Oregon.
• Gray wolf: wolves were extirpated by 1947 and returned on their own when animals dispersed from Idaho, with the first confirmed pack in 2008. The population now numbers close to 200 animals, mostly in the northeast. One wolf known as OR-7 walked from northeastern Oregon into California in 2011, becoming the first confirmed wild wolf in California since 1924 and founding a pack on his return.
• Mountain lion: several thousand statewide, one of the larger populations in the West.
• Moose: a small population that colonised the far northeast naturally, Oregon's newest large mammal.
• Bighorn sheep: both California and Rocky Mountain forms, restored by translocation after the native populations were lost by around 1915.
• Pronghorn, mule deer, black-tailed deer, white-tailed deer: the Columbian white-tailed deer is a distinct subspecies that was federally endangered and has partially recovered along the lower Columbia.
• Bobcat, coyote, red and gray fox, kit fox, badger, fisher, marten, river otter, mink, ringtail, beaver, wolverine in tiny numbers, and Canada lynx as a rare visitor.
• Marine mammals: gray whale, humpback, orca including the endangered southern resident population offshore, harbour seal, Steller and California sea lion, and northern elephant seal. Related: elephant seal facts.
• Bats: 15 species, with several cave and mine roosts of regional importance. See where bats live.

Gone: grizzly bear, with the last confirmed Oregon animal killed in 1931, plus sea otter, which was extirpated and has not been restored despite repeated discussion.

Section 06

Birds Of Oregon

More than 530 species have been recorded, one of the highest state totals, reflecting the coast, the Cascades divide, and the Great Basin.

• Northern spotted owl: the species at the centre of the old-growth logging conflict of the 1980s and 1990s, which reshaped federal forest policy across the Northwest. Its decline has continued despite habitat protection, now driven substantially by the barred owl, a larger and more aggressive relative that expanded west across the continent and displaces spotted owls directly. Federal managers have resorted to lethal barred owl removal, which is among the most ethically contested wildlife decisions in the country.
• Marbled murrelet: a seabird that nests on mossy limbs high in old-growth conifers, sometimes many miles inland, and commutes to the ocean to feed. Its nesting habits were unknown to science until 1974.
• Seabird colonies: common murres nest on Oregon rocks in colonies numbering in the hundreds of thousands, among the largest in the lower 48.
• Sage-grouse and high desert birds: greater sage-grouse leks, plus sage thrasher, Brewer's sparrow, and burrowing owl.
• Malheur and Klamath basins: two of the most important waterfowl and shorebird stopovers on the Pacific Flyway, with spring numbers in the hundreds of thousands and one of the largest wintering bald eagle concentrations in the lower 48 in the Klamath Basin.

Section 07

Reptiles And Amphibians

Oregon has around 28 reptile and 33 amphibian species. One snake is venomous.

Snakes: the western rattlesnake is the only venomous species, found mostly east of the Cascades and in southwestern valleys. Western Oregon has essentially none in most areas. Also gopher snake, racer, common kingsnake, and several garter snakes.

Lizards and turtles: western fence lizard, sagebrush lizard, side-blotched lizard, and short-horned lizard in the east. Western pond turtle and painted turtle are both declining, and the western pond turtle was proposed for federal listing after severe declines from habitat loss and predation by introduced bullfrogs and bass.

Amphibians: the wet west side is the richer half. Pacific giant salamander, Oregon slender salamander, clouded salamander, ensatina, rough-skinned newt (whose skin toxin is potent enough to kill a person who swallowed one, and which is locked in an evolutionary arms race with garter snakes that have evolved resistance), plus Oregon spotted frog, Cascades frog, and the coastal tailed frog, which lives in cold fast streams and is among the most primitive frogs in North America.

Section 08

Dangerous Animals In Oregon

• Deer and elk: vehicle collisions are the leading wildlife hazard, and elk collisions are severe given the animals' mass.
• Western rattlesnake: the only venomous snake, mostly east of the Cascades. Bites are uncommon.
• Mountain lion: several thousand statewide, and Oregon recorded its first fatal cougar attack in 2018, the only one in the state's history.
• Black bear: no fatal attacks recorded in Oregon. Food conditioning at campgrounds is the practical issue.
• Sea lions: they bite, and injuries occur when people approach hauled-out animals or pups on beaches. Keep well back.
• Rough-skinned newt: harmless if left alone, but its skin carries tetrodotoxin, the same toxin as pufferfish, and it should never be handled and then hands put near mouth or eyes.
• Sneaker waves, cold water, and logs: the Oregon coast kills people most years through sneaker waves and rolling drift logs, far more than any animal.

Section 09

Endangered And Protected Species

Oregon's pressures split by the Cascade divide. West of it: loss of old-growth structure, which spotted owls and murrelets need and which takes centuries to rebuild, plus barred owl competition and estuary loss. East of it: cheatgrass-driven fire converting sagebrush permanently, juniper encroachment, and groundwater withdrawal. Statewide, dams and altered river flows remain the largest single factor for aquatic species, and ocean conditions increasingly drive salmon survival in ways no river management can offset.

Section 10

Where To See Wildlife In Oregon

• Malheur National Wildlife Refuge: enormous spring migration in the high desert, with sandhill cranes, waterfowl, and shorebirds.
• Klamath Basin refuges: one of the largest wintering bald eagle concentrations in the lower 48, plus vast waterfowl numbers.
• Dean Creek Elk Viewing Area, Reedsport: reliable Roosevelt elk from a roadside pullout.
• Sea Lion Caves and Cape Arago: Steller and California sea lions and harbour seals.
• Yaquina Head and Three Arch Rocks: common murre colonies, tufted puffins, and nesting seabirds.
• Depoe Bay and the central coast: gray whales, including resident summer feeders close to shore.
• Steens Mountain and Hart Mountain: pronghorn, bighorn, sage-grouse, and high desert species.
• Wallowa Mountains and Hells Canyon: wolves, elk, bighorn, and the state's most rugged country.