
This is the largest COA within the Columbia Plateau Ecoregion extending from Rock Creek to Butter Creek, totaling 809 square miles.
COA ID: 155
Ecoregions

Blue Mountains
Located in NE Oregon, the Blue Mountains ecoregion is the largest ecoregion in the state. It provides a diverse complex of mountain ranges, valleys, and plateaus that extend beyond Oregon into the states of Idaho and Washington.

Columbia Plateau
The Columbia Plateau ecoregion was shaped by cataclysmic floods and large deposits of wind-borne silt and sand earlier in its geological history. It is dominated by a rolling landscape of arid lowlands dissected by several important rivers, and extends from the eastern slopes of the Cascades Mountains, south and east from the Columbia River to the Blue Mountains.
Strategy Habitats

Grasslands
Grasslands include a variety of upland grass-dominated habitats, such as upland prairies, coastal bluffs, and montane grasslands.

Flowing Water and Riparian Habitats
Flowing Water and Riparian Habitats include all naturally occurring flowing freshwater streams and rivers throughout Oregon as well as the adjacent riparian habitat.

Sagebrush Habitats
Sagebrush habitats include all sagebrush steppe- and shrubland-dominated communities found east of the Cascade Mountains.

Wetlands
Wetlands are covered with water during all or part of the year. Permanently wet habitats include backwater sloughs, oxbow lakes, and marshes, while seasonally wet habitats include seasonal ponds, vernal pools, and wet prairies.
Strategy Species

Brewer’s Sparrow (Observed)
Spizella breweri breweri

Bull Trout (Documented)
Salvelinus confluentus

Burrowing Owl (Modeled Habitat)
Athene cunicularia hypugaea

Common Nighthawk (Observed)
Chordeiles minor

Ferruginous Hawk (Observed)
Buteo regalis

Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus

Hoary Bat (Observed)
Lasiurus cinereus

Lawrence’s Milkvetch (Observed)
Astragalus collinus var. laurentii

Lewis’s Woodpecker (Observed)
Melanerpes lewis

Loggerhead Shrike (Observed)
Lanius ludovicianus

Long-billed Curlew (Observed)
Numenius americanus

Northern Sagebrush Lizard (Modeled Habitat)
Sceloporus graciosus graciosus

Pallid Bat (Modeled Habitat)
Antrozous pallidus

Sagebrush Sparrow (Observed)
Artemisiospiza nevadensis

Silver-haired Bat (Observed)
Lasionycteris noctivagans

Steelhead / Rainbow / Redband Trout (Documented)
Oncorhynchus mykiss ssp

Swainson’s Hawk (Observed)
Buteo swainsoni

Washington Ground Squirrel (Observed)
Urocitellus washingtoni

Western Painted Turtle (Modeled Habitat)
Chrysemys picta bellii