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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…

In Oregon, the American three-toed woodpecker tends to use higher-elevation forests; however, forest type may not be as important to this species as the presence of bark beetles. Nests are often fairly low; nest trees are often smaller in diameter than those used by other cavity nesters. Habitat requirements may include trees with heartrot for nesting and high densities of bark or wood-boring beetles. It is rare and local, particularly near and west of the Cascade summit, often near high-elevation lakes or beetle outbreaks. American three-toed woodpeckers are Oregon Conservation Strategy Species in the Blue Mountains and East Cascades ecoregions…

With its erect posture and stately manner, the Ash-throated flycatcher brings a touch of elegance to the oak and juniper woodlands of Oregon. A medium-sized flycatcher, it has a puffy crest and generally pale coloration, sexes are similar. It has gray-brown upperparts and an ashy gray breast; the throat may appear whiter. Belly and undertail coverts are pale yellow. It has two whitish wing bars, and rufous-colored inner webs of the tail and primaries. Juveniles have more extensively reddish tails. It is an uncommon to locally common summer resident in the Rogue and Applegate valleys and a rare vagrant in…

Despite being one of the most common songbirds in deciduous and riparian forests throughout Oregon, the Warbling vireo is frequently overlooked. Its plumage is indistinct. It tends to forage high in the treetops, moving slowly and deliberately among twigs and leaves gleaning insects. Despite its subtle plumage and habits, familiarity with its song makes this vireo easy to find, and a delight to listen to. The Warbling vireo breeds in moderate densities in deciduous habitat throughout Oregon from sea level to montane areas. It is most abundant in the central Coast Range. It is moderately abundant west of the Cascades…

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 moderately small wren maintains the frenetic energy that is so obviously typical of this family of birds. It is a summer inhabitant in many parts of Oregon, generally in open woodlands, thickets, and occasionally in residential gardens. The House wren occurs over the widest latitudinal range of any New World passerine. The House wren nests in a wide variety of native and human-influenced habitats. Nest sites are primarily located within preformed cavities in snags. It is a very uncommon to common transient and summer resident in semi-open woodland habitats throughout the state. In southwest Oregon, it is most common…

This drab, greenish, diminutive species is similar in appearance to the Hutton's vireo, and sometimes confused with that species in western Oregon. Slighter-billed and smaller than the vireo, this little bundle of energy seems always to be moving as it flicks its wings and hops from twig to twig. The male Ruby-crowned kinglet sports a bright red crown spot, typically visible only when the bird is agitated, and in spring pours fourth a delightful melody, surprising for such a small, drab bird. This species breeds in high elevation forests, primarily east of the Cascade crest, where it is common in…

This olive-green warbler is one of the drabbest of Oregon's Warblers., often showing obscure streaking on the underparts and indistinct dark eyeline. The species is named for its telltale orange crown spot but this feature is often hidden, reduced or absent in immature and female birds, and therefore rarely observed in the field. Orange-crowned warblers are one of the earliest and most abundant migrants in Oregon. They glean insects from the undersides of leaves and are often seen probing into dead leaf clusters and flower heads. Perhaps this is why they are able to winter farther north than most other…

The desert woodrat is the smallest member of the genus that occurs in Oregon. The tail is round, short and bicolored and the ears are long and lightly furred. The pelage is long and soft, a mixture of buff and black dorsally and whitish or light buff ventrally; except for he chest, all body hairs have lead-colored bases. The feet and underside of the tail are white. It occurs in Malheur, Harney, and southern Lake Counties. Throughout its range, it tends to be a habitat generalist, but in Oregon it usually occurs in sagebrush habitats, especially those associated with rimrocks…

The flight of Pacific loons by the thousands along the coast each spring and fall is one of Oregon's most dramatic bird migrations. Stunning plumage often clothes these fast-flying travelers. The straight bill, distinguishing Pacific from red-throated and yellow-billed, is less robust than that of common loons. The Pacific's head is larger and its neck thicker than those of the red-throated. In flight, Pacific's wing-beats are faster than those of common, loons the feet appear larger, the forecrown is rounder, and the hindcrown more sloped than those of red-throated loons. This is the most abundant loon off the Oregon coast…

A boldly colored medium-sized bird, the Bullock's oriole builds its characteristic hanging nest in broadleafed trees and tall shrubs, especially when the trees or shrubs are spaced widely and situated along the edges of streams and fields. In Oregon, the Bullock's oriole is a rare to fairly common breeder, especially along major rivers and around farmsteads. It is most widespread in southwest and northeast Oregon. In particular, on the Derby Road in Jackson County. It nests primarily in open spaced cottonwoods, maples, and other tall, forking broadleaf trees. The nest is constructed of plant fibers, hairs, fine grass, and moss…

This bat, found in older forests, has a wingspan of about 10 inches. Its fur is glossy black, tipped with white. It forages over ponds, streams, meadows and roads, often flying very low and roosting behind loose tree bark. Maternity roosts of the silver-haired bat are found in trees. This bat usually bears twins. The silver-haired bat occurs statewide in Oregon except for most of the Columbia Basin and is an Oregon Conservation Strategy Species in all ecoregions except the Nearshore ecoregion. It is primarily associated with coniferous forests, including the juniper woodlands in the southeastern portion of the state…

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…

Bear facts: Is it a black bear or a grizzly bear? Oregon is black bear country. Although native to the area, there are no longer grizzly bears in the state. The last grizzly bear recorded was killed in the late 1930s at Billy Meadows, north of Enterprise in Wallowa County. However, because black bears are often brown, people sometimes wonder what species of bear they have seen. Here is some information on bear identification. Q. Grizzly bears are brown and black bears are black. Correct? A. Not really. Grizzly bears can be brown, blond, grey, reddish or silver tipped. Black…

These very abundant seabirds are uncommon off Oregon in winter. Their arrival coincides with some of the Pacific Northwest's stormiest weather. Complicating detection difficulties is their identification; they look very much like the abundant sooty shearwaters - all dark, but slightly smaller with shorter bills and tails. Studied on their Tasmanian breeding grounds continuously for over 45 years, once they leave for the open ocean little is known about them. Popularly know as "muttonbirds," they have been harvested as food for centuries on their southern seas breeding islands. Even today, up to 300,000 chicks are harvested in Tasmania each year…

This pugnacious little wren, formerly known as the Long-billed marsh wren, inhabits cattail, bulrush, and other marsh plants. As the only Oregon species of wren that nests over water, it is easy to identify when seen, but sexes are difficult to differentiate in the absence of song due to similar coloration. This species has long been of interest to behavioral and evolutionary ecologists due to its polygyneous mating system, widespread construction of dummy nests, and the male's complex singing behavior. The Marsh wren nests statewide in appropriate wetland habitats. It is particularly common during breeding season around Malheur National Wildlife…

The Northern fur seal is the smallest member of the family in Oregon. The flippers are nearly twice as large as those of a comparably-sized individual of any other species of otariid. The ears are cylindrical and the auditory meatus is covered with wax to prevent entry of water. The pelage consists of coarse guard hairs and an exceedingly thick underfur that serves as waterproof insulation. Adult males are dark gray or brown dorsally and reddish brown ventrally; a grayish cape covers the neck and shoulders. Adult females are grayish brown dorsally and reddish brown ventrally. The Northern fur seal…

The Fisher is considerably larger than the marten and males are considerably larger than females. It is more stockily built than the weasels, but is similar in that the head is somewhat pointed, the body elongate, and the legs short. The pelage is long except on the face. The fur is dark brown grading to black on the rump and legs; the tail is black. Fishers once occurred throughout the coniferous and mixed forests of Oregon's Coast Range and Cascade Mountains. Currently, there is a native population in the Siskiyou Mountains and an introduced populations in the southern Cascades that…