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This is one of the most widespread and familiar waterbirds in Oregon. It is the largest heron in North America, standing approximately four feet tall. It is slate gray with a white crown, cheeks, and throat, rusty thighs and a uniformly yellow bill. Adults develop long gray-white plumes on chest, neck, and back during breeding. Juveniles have similar plumage but may be distinguished by absence of breeding plumes, a dark crown, and dark upper bill. Great blue herons frequent many habitats from shallow areas of marshes, lakes, streams, and oceans, where they feed on fish, amphibians, and aquatic invertebrates; to…

The Northern harrier is a slender, medium-sized hawk characterized by a noticeably long tail, bold white rump patch, and owl-like face. Commonly encountered in large expanses of open country, its main hunting technique is through use of a distinctive buoyant, gliding flight low over the ground that relies heavily on visual as well as auditory cues to detect prey. The larger females have rich brown upperparts while adult males are mostly light to medium gray, sometimes appearing almost ghostly silvery-white. Males are noted for their high-spirited and acrobatic courtship displays, in particular a series of dives and barrel rolls in…

The Caspian tern nests on flat sandy or gravelly areas on islands, or on the margins of lakes, rivers, and marshes. It is always near water, and forages both in nearby water bodies and on prey exposed in nearby open areas. Breeding colonies in recent years have been on islands in the Columbia River east of the Cascades in north central Oregon; Malheur and Harney lakes in southeast Oregon; Summer Lake and lakes in the Warner Valley in south central Oregon. Most colonies have a history of intermittent use. It is a locally common summer resident during breeding season within…

The Tufted Puffin is extremely charismatic and the most recognized seabird in Oregon. It is easily identified in the breeding season by the colorful laterally compressed bill, a distinct white face with long cream-colored facial plumes, black body, and reddish-orange feet. In winter it moves offshore and loses most of its colorful plumage and bill plates.‌ Tufted Puffins are burrow-nesters and feed at sea. Along the Oregon coast, they primarily nest on soil-covered islands free of mammalian predators. They also occasionally nest on headlands such as Cape Mears, Cape Lookout, Cape Foulweather, and Yaquina Head. ‌ Tufted Puffin populations have…

The Short-eared owl is one of our most conspicuous owls owing to its use of open country and crepuscular habits. It is often seen hunting low over the ground across marshes, fields, and other open areas on its buoyant, long wings, flying slowly and irregularly like a giant moth. This owl also differs from most other owls as it seldom vocalizes and is more often seen than heard. It was named for its inconspicuous "ear" tufts arising from the center of the forehead, though field observers rarely see these tufts. Distinguishing characteristics include a pale buff facial disk and a…

This long-distance, relatively late-arriving migrant to Oregon is associated with shrub-dominated habitats, especially riparian willow thickets. The plumage has subtle tones of olive-green and gray; the species is without a visible eye-ring but the characteristic sneezy, abrupt song reveals its presence. The Willow flycatcher breeds in western Oregon from sea level along the coast and interior to above 5,000 feet west of the Cascades summit. In eastern Oregon it breeds mostly above 1,000 feet from Klamath to Burns and also Lake County and Union County. The habitat of breeding Willow flycatchers is characterized by dense shrubs and/or tall herbaceous plants…

Wide open spaces generally surround these sparrow-sized, ground dwelling birds. The upperparts are mostly brownish and the underparts are generally buffy with varying amounts of yellow on the throat. There is black on the breast and side of the head, but the most unique features are small black "horns." Females and immature birds are duller. Interesting behavior includes aerial displays and "flight songs" during courtship, and the propensity to forage and loaf along dirt and gravel roads. In western Oregon, it breeds in small, scattered populations throughout the Willamette Valley, with concentrations in the central valley on and near Basket…

The bright yellow, red, and black plumage of the male Western Tanager, so conspicuous in open situations is very obscure in forested areas where it tends to blend into the shaded foliage. The species perhaps is best known in migration when it visits city parks, orchards, and other open urban and suburban areas. It is attracted to birdbaths but seldom to bird feeders. It breeds in open coniferous forests and mixed coniferous and deciduous woodlands, primarily in mountains. They usually nest in conifers - rarely deciduous trees - at varying heights, usually well out on a branch, often at the…

The common muskrat is the largest arvicoline rodent on Oregon. The body is heavy and rounded, and except for the tail and feet, heavily furred. The eyes are beady; the ears are rounded and almost covered with fur; the tail is flattened laterally, scaly, keeled, and naked except for a few hairs on the keel. The forefeet are relatively small, but the hind feet are large and partly webbed. The pelage consists of an exceedingly dense underfur usually overlain by glossy dark-brown guard hairs; the underfur is waterproof. Reddish, blackish, silvery, and white individuals have been recorded. In Oregon, muskrats…

The body of the Pacific harbor seal is plump but tapers to small rear flippers permanently extended posteriorly. The head is large and rounded, the eyes are large, the limbs are short, and the nostrils sit dorsally on the muzzle. The nostrils can be closed when this seal dives. The tongue is notched at the tip. The pelage consists of long overhairs that overlay short underhairs. Markings are extremely variable, but in general the pelage is gray or brownish gray with numerous small spots of black that may coalesce to form splotches. Pacific harbor seals have been observed ashore at…

Adult treefrogs have a dark mask that extends from the tip of the nose across the eyes to the shoulders. Coloration varies between individuals, ranging from green or reddish to brown or gray. Most have dark blotches along their sides with light colored bumpy undersides. They have special skin glands that produce a waxy coating to keep their skin moist. Male treefrogs have a dark gray, inflatable throat pouch during the breeding season. As the smallest frog species in Oregon, adult Northern Pacific treefrogs only grow to two inches in length. During the non-breeding season, this treefrog is found in…

The majestic trumpeter swan is the largest of our native waterfowl and one of the heaviest flying birds in the world with males sometimes exceeding 30 pounds. Historically hunted to the brink of extinction, it was recognized as an endangered species long before there was an Endangered Species Act, and its recovery is a conservation success story. The adult's snow-white plumage with contrasting black bill and feet and 8-foot wingspan define this magnificent bird. Their neck is as long as their body and is used to reach food at the marsh bottom. In spring, the trumpeter swan is a locally…

Although the least numerous scoter on the continent, it is the most common scoter along the Pacific coast south of Alaska and winters by the thousands off Oregon. Adult males' plumage, black except for white patches on the forehead and nape, yields attention to the bill, a swollen white, red-orange, yellow, and black wedge feathered squarely along its base. The highly visible standard advertises male's presence for up to a mile. Dark-billed adult females and subadults are dark brown above and paler brown below, with two indistinct light patches on the cheeks and sometimes on the nape. A flattened head…

With four wing-beats each second pushing them to 62 miles per hour, brant are the fastest and strongest geese in flight and among the swiftest of all large birds. Black brant comprise the vast majority of brant occurring in Oregon. These small geese have smoky black backs and bellies, and dissected white collars and white around the tails provide striking contrast. The black brant can live up to 20 years and are resilient enough to ride out storms on the open ocean. In Oregon, wintering numbers along the coast have seen a 50 percent reduction from previous years due to…

The Red crossbill is aptly named for its unusual bill configuration of crossed upper and lower tips of the mandibles which it uses to pry seeds primarily from native conifer cones. Degree of bill crossing is variable depending on wear, and it can have a right or left cross. Adaption to varied conifer cone structures and sizes has resulted in a diversity in body size, bill size and shape, and palate configurations in Red crossbills. Juveniles are brown with heavy streaked undersides and faint buff wing bars. Mature males are red with dark brown flight feathers and tail; first-year males…