The North Santiam River Corridor that borders Linn and Marion Counties from the confluence with the Willamette River through confluences of Jefferson ditch and Valentine Creek near Stayton and the South Santiam River ‘s Confluences with Spring Branch, Thomas Creek, Spring Creek, Crabtree Creek, Onehorse Slough, and Noble Creek to Sweet Home.
COA ID: 078
The West Cascades ecoregion extends from east of the Cascade Mountains summit to the foothills of the Willamette, Umpqua, and Rogue Valleys, and spans the entire length of the state of Oregon. It is largely dominated by conifer forests, moving into alpine parklands and dwarf shrubs at higher elevations.
The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.
Grasslands include a variety of upland grass-dominated habitats, such as upland prairies, coastal bluffs, and montane grasslands.
Natural lakes are relatively large bodies of freshwater surrounded by land. For the purposes of the Conservation Strategy, natural lakes are defined as standing water bodies larger than 20 acres, including some seasonal lakes.
Oak woodlands are characterized by an open canopy dominated by Oregon white oak.
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.
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.
Acorn Woodpecker (Observed)
Bradshaw’s Desert Parsley (Observed)
California Myotis (Modeled Habitat)
Cascade Torrent Salamander (Modeled Habitat)
Chipping Sparrow (Observed)
Clouded Salamander (Modeled Habitat)
Coastal Cutthroat Trout (Documented)
Oncorhynchus clarki clarki
Common Nighthawk (Observed)
Foothill Yellow-legged Frog (Observed)
Fringed Myotis (Modeled Habitat)
Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus
Hoary Bat (Modeled Habitat)
Northern Red-legged Frog (Observed)
Northern Spotted Owl (Modeled Habitat)
Strix occidentalis caurina
Olive-sided Flycatcher (Observed)
Oregon Chub (Documented)
Oregon Slender Salamander (Modeled Habitat)
Oregon Vesper Sparrow (Observed)
Pooecetes gramineus affinis
Purple Martin (Observed)
Progne subis arboricola
Short-eared Owl (Observed)
Asio flammeus flammeus
Silver-haired Bat (Modeled Habitat)
Southern Torrent Salamander (Modeled Habitat)
Townsend’s Big-eared Bat (Modeled Habitat)
Western Bluebird (Observed)
Western Gray Squirrel (Modeled Habitat)
Western Meadowlark (Observed)
Western Painted Turtle (Observed)
Chrysemys picta bellii
Western Pond Turtle (Observed)
Western Rattlesnake (Modeled Habitat)
White-topped Aster (Observed)
Willamette Daisy (Observed)
Willow Flycatcher (Observed)
Yellow-breasted Chat (Observed)
Icteria virens auricollis