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Although quite common in the U.S., the Black-crowned night-heron's nocturnal and crepuscular feeding habits can make it difficult to locate. Its habitat consists of marshes, lakes, rivers, and other wetlands, where it feeds mostly on fish. It is a thick-billed, medium-sized, stocky heron with relatively short neck and legs. Adults have a black back and cap which contrast with the pale gray or whitish underparts. Immatures have brown backs with large pale spots and heavily streaked underparts. A distinctive choking squawk call is often heard at dusk. It is a fairly common summer resident east of the Cascades where it…

Features: Sacramento perch are blackish above with about seven vertical dark bars that are irregular in form and position. They are not a true perch, but a sunfish. It is the only member of the sunfish family native to the west coast and, in Oregon, is found only in the Klamath Basin. Sacramento perch are distinguished from the other sunfish in Oregon by having 12 or 13 dorsal fin spines whereas all the others have 10 or fewer. Maximum size in Oregon is about 12-inches in length and a weight of about 3/4 pound, although in California they have been…

Features: Pumpkinseeds may be identified by the orange or red spot on the ear flap and the orange cheeks with wavy blue or turquoise stripes. Color is exceedingly brilliant and somewhat variable; olive to brassy-green above, the back finely dusted with gold or emerald. Habitat: Pumpkinseeds are found in the same habitats and often in association with bluegills. Adults often congregate beneath old deadheads and trees that have fallen into the water. Food habits are also similar to bluegill. They consume large numbers of snails by browsing on the stalks of aquatic vegetation. Techniques: Pumpkinseed are found in many of…

Features: Redear sunfish are often confused with bluegill, but differ by having a red or orange border around the black ear flap and by lacking the spot on the dorsal fin and the vertical bars on the side. Habitat: In Oregon, redear sunfish are found only in a few ponds in the Willamette Valley and the central part of the state. In their native range, redear sunfish prefer warm, large lakes and reservoirs and bayous with vegetated shallow areas and clear water. They feed primarily on the bottom and seldom take surface insects. The diet consists mostly of zooplankton, insect…

Features: Warmouth have more of a bass-shaped body and a larger mouth than the other sunfishes, other than the green sunfish. Warmouth are yellowish brown in color with three or four brownish bars radiating back from the eye over the gill cover. They can be distinguished from the green sunfish by the absence of turquoise mottling on the gill cover and the lack of a dark spot at the rear base of the dorsal fin. Habitat: In Oregon, warmouth are present in a few coastal lakes and widely distributed in the Columbia basin, but are not commonly caught by anglers…

Features: Color varies, but walleye are generally dark olive-brown on top grading to almost white below. Walleye have two well-separated dorsal fins; the first fin has a large black spot at its rear base. The opaque eyes, giving the fish its common name, and canine teeth are other prominent features. Habitat: Walleye are found in the Columbia, Willamette and Snake rivers. In the Willamette River, the walleye fishery is generally limited to the section downstream from Willamette Falls at Oregon City, although a few have been documented as far upstream as Dexter Dam. Walleye prefer large, clean and cold or…

Features: Largemouth bass are greenish on the back and sides with a white belly and usually a dark horizontal stripe along the side. They are distinguished from their close cousin, the smallmouth, by a large mouth with the upper jaw extending behind the eye. Largemouth bass in Oregon can exceed 25 inches in length and a weight of 12 pounds. Habitats: Their preferred habitats are shallow ponds and lakes, or the backwater sloughs of rivers where aquatic plants or submerged logs and brush provide abundant cover. Largemouth bass begin life feeding on zooplankton (tiny crustaceans), but soon switch to insects…