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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

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

This chunky swallow is readily recognized by its square tail and orangish rump patch. It nests colonially and has taken to human-made structures so well that it has greatly expanded its range into many areas otherwise not suitable for it. It does not do well in urban settings, however, and quickly disappears when areas become densely settled. The unique gourd-shaped mud nest is often usurped by other species for nesting and is often used for protective roosting sites by rosy-finches and other wintering species. It is a locally common to abundant breeding bird near water throughout most of Oregon. Its

A constant chatter of high-pitched staccato tidi tidi tidi or tideet tideet calls coming from the canopy of ponderosa pine forests east of the Cascade Range is a sure sign of the presence of this tiny, highly active, social nuthatch. Measuring only 3.75-4 inches long, this stubby mite is the smallest and plainest of the three western U.S. nuthatches. This is a tree-bark clinger that has a woodpecker-like bill for probing bark, opening seeds, and cavity excavation. The Pygmy nuthatch forages all the tree surfaces from the trunks to the outer- and top-most needles and cones. The Pygmy nuthatch is

Brown creepers are the only North American birds that rely on both the trunk and bark of trees for both nesting and foraging. They are small birds, about five inches in length, and have a long, slender, down-curved bill used to probe for insects hidden in the furrows of tree bark. Their brown back, streaked with white, makes creepers on of the best-camouflaged girds of the forest. They most often forage upward from the base of a tree, using their long, stiff tail for support. The Brown creeper breeds and winters throughout forested areas of Oregon, from the coast to

Even in the most barren and desolate reaches of the Great Basin, the cheerful song of the hardy Rock wren will contradict any notion that the desert is devoid of life. This specialist of cracks and crevices can be found almost anywhere there is exposed rock. One of its most unique features is the mysterious pebble path is constructs from its stone-cave nest to the outside entrance. Drab and pale overall, the gray head and back, white to tawny underparts, and gray tail with buff-tipped corners distinguish this species from other wrens. The Rock wren is a common breeder in

Wigeon drakes are beautifully marked with white pate, green eye stripe, purplish breast and flanks, white belly and wing covert patch, and iridescent black/green speculum. The grayish hen shows white on the wing covert patch. Drakes give a three-note whistle and get progressively noisier as spring approaches and courting flights begin. Medium sized flocks are common in fall and winter, and like geese, will be found grazing pastures, park lawns, and golf courses. It is a rare to locally common breeder in eastern Oregon and rare in summer in western Oregon. It is a common to abundant migrant and wintering

The blue-winged teal is one of Oregon's least common ducks. It is a small, warm-weather duck usually found in Oregon only from late spring until the weather cools in early fall. Except for adult drakes in alternate plumage, blue-wings are difficult to distinguish from cinnamon teal. For that reason its status in Oregon is less clear than that of other ducks. Adult blue-wing drakes have a gray head with white crescent between the eye and bill. Hens and young of both species are nondescript small brown ducks, but show the prominent blue wing-covert patch in flight. It is an uncommon

The ring-necked duck, which would have been better named "ring-billed duck" and is called "blackjack" in the southeastern United States, frequents different habits than the scaups with which is is often confused. The black back, white crescent on the side just in front of the wing, and white-ringed bill separate the drake ring-neck from the scaups. The brownish neck ring of the male in alternate plumage is not prominent. The hen is a small dark brown duck with a buff face. Drakes in courtship give a head-throw accompanied by a wow note while hens utter a growling purr. Ring-necks are

The bufflehead is North America's smallest diving duck, giving it the advantage of being able to nest in abandoned holes of northern flickers, a plentiful resource off limits to larger cavity-nesting ducks. It is a swift flyer and takes wing from water more easily and neatly than other diving ducks. Widely distributed throughout the state in winter, males attract attention with their striking white body, black back, and iridescent black head with a large notch of white; females and juveniles are dark charcoal-gray with a conspicuous white patch behind and below the eye. It is a local, uncommon breeder in

The common goldeneye drake is a strikingly handsome black-and-white diver about the size of a greater scaup. Goldeneyes are strong, fast flyers nicknamed "Whistlers" for the sound of their primaries as they zoom past on a still day. Drakes have a black head with a white spot below and in front of the eye, white neck, breast and flanks and a black back and tail. Hens have a brown head, light neck, breast and belly, brown backs and flanks. They are fairly silent and usually alone or in small groups. They tend to remain apart from other ducks. It is

The bubbly warble of this finch is common in western Oregon conifer forests in summer, while its Crossbill-like - but more delicate - pik call is heard in lowland valleys in the winter. Adult males have a distinctly reddish-colored head, face, rump, throat, and breast, broadly but very faintly streaked brownish-pink sides, and a diffused brownish-red nape, back, and wings. Females and immature males have brownish-olive upperparts, wings, and tail, with contrasting streaking. Underparts are buffy-white to off-white with fuzzy, brownish streaking; a dingy pale gray stripe is present above the eye. In Oregon, the Purple finch breeds west of

The House sparrow is an invasive species introduced from Europe. No other North American wild bird is so associated with human settlement as this introduced House sparrow. Its foods are nearly all imports, and its nesting and cover requirements are also human-derived. The House sparrow and European starling are the only introduced passerine birds that are thriving in Oregon. These birds can dominate bird feeders and utilize nest boxes that were intended for native species. The House sparrow can be found statewide around buildings at human developments of adequate size ranging from scattered farmsteads in remote and rural areas to

The yellow-pine chipmunk is one of the smallest in Oregon, only slightly larger than the least chipmunk. Its face is marked with a dark stripe, followed laterally by two alternate light and dark stripes. The outermost light strip is nearly white. It occurs on the east slope of the Western Cascades and eastward through most of the remainder of Oregon, except it is absent from most of the Columbia Basin and much of southern Harney, eastern Malheur, and southern Baker counties. Its range also extends westward in the Siskiyou Mountains in southern Jackson and Josephine counties. Ponderosa pine seems to

The least chipmunk is the smallest chipmunk in Oregon, but it is only slightly smaller than the yellow-pine chipmunk. As in all chipmunks, the face is marked with a dark stripe through the eye bordered on each side with a light- and a dark-colored stripe. The middorsum is marked with a dark-colored stripe followed on each side by two alternating light- and dark-colored stripes. The least chipmunk has the largest geographic range of any chipmunk. In Oregon, it occurs east of the Cascade Range except in the Columbia Basin and most of the Blue Mountains. In general, it is a

The pelage of this chipmunk is marked with five dark and four light stripes on the dorsum; the middorsal stripe is usually black and nearly always darker than the other four dark stripes. The sides of the face are marked with three brown and two light gray stripes, a patch behind the ear is light gray. The tail is blackish frosted with ochre dorsally and rusty brown ventrally. Allen's chipmunk produces a call of a rapid series of three or four to as many as 10 syllables. In Oregon, it occurs in forested areas along the eastern part of the