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Nearly a dozen subspecies of Odocoileus hemionus are recognized. Of these, two occur in Oregon - the mule deer and Columbian black-tailed deer, often just referred to as "Black-tailed deer." The mule deer is larger, lighter in color, and often associated with more open habitats, whereas the black-tailed deer is smaller and darker, and frequents dense, early seral forest communities. The most distinguishing feature of the black-tailed deer is the tail. Although not as long or wide as that of the white-tail, it is much larger than that of the mule deer. Because of the differences in size, color, marking…

Along coastal shores and islands, the chatter and flight calls of Black turnstones invite an observer to look more closely at the rocky substrates to find these birds busily picking about in their search for food. They primarily use rocky shores, jetties, and offshore islands, but may also be found on shorebird flats and sandy beaches. The Black turnstone is a common transient and winter visitant on the coast. Hear the call of the Black turnstone Phogo by ©Keith Kohl, ODFW

The Costa's hummingbird is a very rare spring and summer visitant to central and southwestern Oregon. Males are sometimes present for the entire year in the Rogue Valley. Males have been observed in canopy-free riparian habitat along Bear Creek and semi-open tall white oaks at the edge of Agate Lake. Many of these birds go undetected in Oregon because of their similarity with other hummingbird species. Hear the call of the Costa's hummingbird Photo by Mick Thompson, Flickr

This winter visitor is a study in gray and tan, with a small dark spot on an otherwise gray breast, dull rufous stripes on the side of the head and crown, and brown wings with distinct white stripes. Tree sparrows visit Oregon only in winter, mainly in lowlands within the Blue Mountains and Owyhee upland regions with a few farther west in some years. They frequent willow clumps in grassy areas and occur occasionally at feeders. Hear the song of the American tree sparrow Photo by Eric Began, Flickr

This is a large and power falcon. The majority of Gyrfalcons seen in Oregon are immatures or adults of the "gray" type, but there are several reports of "white" birds. The Gyrfalcon is a regular winter visitant to Oregon. The majority of sightings come from coastal and Willamette Valley lowlands near waterfowl concentrations. Individuals have been seen chasing and feeding on geese, ducks and gulls. Gyrfalcons forage by flying low over the ground and flushing prey, then often giving spectacular tail chases. If a bird refuses to flush the hunt is usually unsuccessful. East of the Cascades it occurs around…

This foreign visitor is regularly found in Oregon among wintering flocks of American widgeon. Drakes are easily distinguished from American wigeon drakes by reddish brown head, gray flank, and lack of green eye stripe. Hens are similar to American Wigeon hens and difficult to distinguish. The call of the male is a shrill whistling, whe'e you; the female's voice a low purr or croak. It is a rare to uncommon visitant east of the Cascades. Hear the call of the eurasian wigeon Photo by ©Greg Gilson

The Dunlin undergoes one of the most dramatic changes in appearance of all shorebirds when it molts from winter to breeding plumage. In winter, these medium sized sandpipers are brownish gray above with white underparts, but in breeding plumage they have a striking rufous-brown back and cap and black belly. Females are larger than males but otherwise similar in appearance. The Dunlin is an abundant transient and winter visitant in estuaries and occasionally on beaches along the coast of Oregon, but significant numbers winter in the Willamette Valley, especially the southern part. Hear the call of the Dunlin Photo by…

In winter plumage, the crisp black head, white neck patch, and gray back are striking, and when combined with a pale bill this species is readily distinguished from small alcids in Oregon. Wing-propelled divers, they are nonbreeding visitors to Oregon's offshore waters. They are the only seabirds whose young are reared entirely at sea. The Ancient murrelet is an uncommon to common fall migrant and winter visitant in shelf waters near shore; rare to uncommon in spring; absent to rare in summer. Hear the call of the Ancient murrelet Photo by Patty Mcgann, Flickr

The Swamp sparrow uses wet areas that have thick vegetation for cover. Several glimpses of this reclusive bird may be required before it can safely be separated from Lincoln's sparrow or the more common Song sparrow, though its distinctive call will give it away to observers familiar with it. Chestnut coloration on the wing coverts helps separate this species from other wintering sparrows. The Swamp swallow is a rare to uncommon spring and fall transient and winter visitant in western Oregon, especially along the coast. Hear the song of the Swamp sparrow Photo from USFWS