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The Washington ground squirrel is the smaller of the two short-tailed, spotted ground squirrels in Oregon. The dorsum has squarish grayish-white spots on a background of pale smoky-gray with a pinkish wash to brownish gray. This squirrel is endemic to the Deschutes-Columbia Plateau Province east and south of the Columbia River and east of the John Day River. A colonial species, it emerges from dormancy in January to early March, males before females. At the approach of a potential threat, the Washington ground squirrel produces a soft, lisping whistle. Other members of the colony respond by standing upright, repeating the…

The moose is the largest member of the family Cervidae. The pelage is blackish or dark brownish grading to dark gray or grayish brown on the venter and leg. The muzzle is broad and overhanging, the palmate antlers of adult males are massive, and a "bell" (waddlelike flap of skin on the throat) is present. The first moose to come to Oregon wandered south from Washington or west from Idaho across the Palouse Prairie. They stayed to establish a herd in the Blue Mountains north of Elgin, and today there are an estimated 50 adults and calves in the area…

Adult Cascades frogs have tan, copper or green backs with black spots and yellow bellies. Their skin has small bumps on the back and sides. Females, which grow to three inches in length, are slightly larger than males. Cascades frogs live in a variety of moist habitats including mountain meadows, bogs, seasonally flooded forested swamps and shallow ponds, marshes and lakes. They use woody debris, mud or dense vegetation for cover from predators and spend their winters hibernating in mud. They emerge during the summer and live in wet meadows and bogs or along forested streams and pond edges. The…

Canvasbacks are large; adults in good condition are as heavy as mallards and second in size only to the white-winged scoter among common Oregon ducks. Drakes have a reddish head and neck; black breast, lower back and tail coverts; nearly white back, flank, and belly, and dark gray tail. The hen is grayish brown with a darker brown head, neck, breast and tailcoverts. It is an occasional summer resident in northeast Oregon, nesting locally only at Ladd Marsh in Union County. It is an uncommon spring and fall migrant in northeastern Oregon and regular in winter and spring on the…

Although not as imposing as the Canvasback, the redhead is a large, handsome, fast-flying diver. The drake has a red head, black breast and tail coverts, and steel gray back, flanks and tail. Hens are a medium brown. During courtship, the drake utters a very un-duck-like meow. Known for nest parasitism - laying eggs in the nests of other birds, usually other diving ducks - redhead eggs have also been found in the nests of a variety of species. It is an uncommon summer resident in northeast Oregon, but commonly breeds at Batch and Bogus lakes and locally elsewhere in…

Known as "bluebill" to most hunters, this species is one of the most abundant and widespread of North American ducks. The lesser scaup is similar to the greater scaup in appearance and habits, but is smaller and lacks the white on the primaries. In the field, however, the black-and-white drakes and brown hens are very similar to greater scaups. The common vocalization is the purr call of the female; drakes are usually silent, but utter a low single-note whistle in courtship. In general, the lesser scaup is more apt to be found in interior or freshwater habitats while the greater…

The pied-billed grebe is an aquatic species that breeds at the edge of open water in freshwater lakes, ponds, sluggish rivers, and marshes. When disturbed, it sinks like a submarine, rather than diving, and re-emerges with only its head above water. This is a brownish grebe with a black vertical bar in the middle of the rather stubby, whitish bill, and jet-black throat patch on both sexes in alternate plumage. It has a surprisingly loud "yelping" call within a marsh. Young have striking stripes on the head. This bird is widespread and common in Oregon. It winters locally in open…

Cattle egrets are the smallest of Oregon's three egret species, with short, stout neck and legs, and white body with orange-buff plumes on the head and nape in spring and early summer. They are named for their association with livestock, consuming insects on their backs or stirred up by their hooves. In Oregon, the Cattle egret is a casual transient in spring in the Klamath Basin and rarely in the Malheur National Wildlife Refuge. The least widespread of the state's egrets during the breeding season; a rare breeder in the Great Basin and a few pairs occasionally nesting at Malheur…

At first look, the Willet is a rather drab and nondescript medium-sized shorebird found in wetland habitats and nearby uplands. However, further observation reveals subtle patterning in its relatively uniform grayish plumage and birds in flight expose a distinct, bold white wing bar that contrasts with a black border. Sexes are similar in appearance at all times of the year. Willet are present on breeding grounds in Oregon for a short period of time during spring and summer, but displaying birds are conspicuous and emit a loud and persistent "pill-will-willet" call. These vigilant and vocal individuals often hover overhead and…

This medium-sized shorebird is the most common dowitcher in eastern Oregon and inland locations, where it sometimes gathers in large flocks feeding in shallow water. It is also the only dowitcher in the state that regularly winters. Although breeding plumage adults are reddish below and heavily patterned above, most birds seen in Oregon are duller postbreeding adults or browner immatures. During winter, when shorebirds are hard to find, a small flock of chattering dowitchers, even in plain gray basic plumage, often brightens a day in western Oregon. In migration, it can be found at almost any shallow water site in…

The nasal meow of the Franklin's gull can be heard as it soars above wetlands and meadows, and colonies of this species are reported to be the loudest of all the gulls. In breeding plumage, the black hood contrasts sharply with the white breast and bright red bill. This species depends much more on insects and other invertebrates than do other gulls, and is therefore considered economically beneficial and favored by farmers. The Franklin's gull occurs in the southeast portion of the state in spring and summer, especially Harney Basin. It is rare west of the Cascades. It nests locally…

This diminutive owl is one of the smallest in North America, with a body mass of about 1.9 ounces. It has dark eyes, brown plumage with darker and reddish variegations, and small ear tufts. The Flammulated owl is unique among owls in the Pacific Northwest in that it preys almost exclusively on insects and is a neotropical migrant. Additionally, the pitch of its rather ventriloquial hoot is among the lowest of all North American owls. The Flammulated owl breeds on the eastern slope of the Cascades, in the Blue and Wallowa mountains, and in small numbers in the mountains of…

Almost strictly nocturnal, the Western screech-owl hunts discreetly at night and roosts during the day in dense woodlands, its perfectly streaked plumage allows it to pass as tree bark. These habits make it difficult to see, and it is more common than many are aware. It is a small owl with yellow eyes and feathered ear tufts. It exhibits geographic variation in plumage color and pattern: both gray morphs and brown morphs occur in the Pacific Northwest. Sexes are alike. The Western screech-owl is a fairly common year-round resident in lower-elevation woodlands throughout Oregon. It is usually found below 3,000…

This tiny owl has a reputation as an aggressive predator on everything from mice and voles to birds and mammals over twice its size. Coloration is highly variable with brown and gray morphs. In Oregon, color varies from dark brown in coastal mountains to gray in eastern Oregon, with an intermediate pale grayish-brown form in the Cascade mountains. About the length of a White-crowned sparrow, it has striking yellow eyes, dark vertical streaks on the breast and abdomen, and dark "eyespots" on the back of the head. It is primarily diurnal and can often be approached quite closely when it…

Because of its association with old forests, this inconspicuous, dark brown owl has become one of the most controversial birds in the Pacific Northwest. The dark eyes and creamy white mottling on the breast and abdomen are distinctive, as is the lack of fear of humans. Both adults and young will typically allow humans to approach within a few feet, and it is not unusual for curious juveniles to follow hikers through the woods. The Northern spotted owl is a permanent resident in forested regions of western Oregon, from the coastal mountains to the eastern foothills of the Cascade Range…

The Common nighthawk is a migrant to Oregon with one of the longest migration distances of any North American bird. It is also one of the last to arrive in Oregon. Long, slender wings are marked by a white patch on the "hand" visible in flight from great distances. When perched on the ground, the cryptic brown, gray, and black mottling makes the bird almost invisible. This bird breeds and migrates at all elevations through the state. Its nesting habitat is characterized by open landscapes with little ground cover and is most abundant in sagebrush and rocky scablands and rimrock…

Anna's hummingbird is the largest hummingbird common to our region. It is the only hummingbird regularly found in Oregon in winter, during which time it is exposed to short day lengths, limited sources of food and periods of intense cold. It is more vocal than most hummingbirds with males uttering a dry, scratchy buzz of a song that can be heard throughout the year. It is a rare to locally uncommon summer resident west of the Cascades in interior valleys and along the coast; also along the Columbia River east to The Dalles. It occurs and probably breeds into the…

The haunting cries of these wanderers evoke a variety of reactions from curiosity to wonder. Highly social, the Pinyon jay epitomizes the dynamics of flock behavior such as colonial nesting, communal feeding of young and non-territoriality. Although Pinyon jays are nomadic and unpredictable, each flock is a tight-knit, integrated unit occupying a home range that does not overlap with other flocks. Flocks may wander widely outside their home range if sufficient food is not available. The Pinyon jay is a permanent resident in juniper and ponderosa pine woodlands of central Oregon. Oregon's known breeding population is confined to the Metolius…