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This area is comprised of the 1,500-acre Sandy River Delta at the confluence of the Sandy and Columbia Rivers, plus the Lower Sandy River and its tributaries, including Beaver Creek and the lower reaches of the Bull Run River. Located east of the Portland Metro area in the Columbia River Gorge National Scenic Area.
COA ID: 057
Ecoregions
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West Cascades
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.
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Willamette Valley
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.
Strategy Habitats
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Grasslands
Grasslands include a variety of upland grass-dominated habitats, such as upland prairies, coastal bluffs, and montane grasslands.
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Late Successional Mixed Conifer Forests
Late successional mixed conifer forests provide a multi-layered tree canopy, including large-diameter trees, shade-tolerant tree species in the understory, and a high volume of dead wood, such as snags and logs.
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Natural Lakes
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.
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Oak Woodlands
Oak woodlands are characterized by an open canopy dominated by Oregon white oak.
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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.
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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
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American Pika (Observed)
Ochotona princeps
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California Floater Freshwater Mussel (Observed)
Anodonta californiensis
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California Myotis (Modeled Habitat)
Myotis californicus
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Cascade Torrent Salamander (Observed)
Rhyacotriton cascadae
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Cascades Frog (Modeled Habitat)
Rana cascadae
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Chinook Salmon (Documented)
Oncorhynchus tshawytscha
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Chipping Sparrow (Observed)
Spizella passerina
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Chum Salmon (Documented)
Oncorhynchus keta
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Clouded Salamander (Modeled Habitat)
Aneides ferreus
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Coastal Cutthroat Trout (Documented)
Oncorhynchus clarki clarki
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Coastal Tailed Frog (Modeled Habitat)
Ascaphus truei
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Coho Salmon (Documented)
Oncorhynchus kisutch
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Common Nighthawk (Observed)
Chordeiles minor
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Cope’s Giant Salamander (Modeled Habitat)
Dicamptodon copei
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Fringed Myotis (Modeled Habitat)
Myotis thysanodes
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Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus
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Great Gray Owl (Modeled Habitat)
Strix nebulosa
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Harlequin Duck (Observed)
Histrionicus histrionicus
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Hoary Bat (Modeled Habitat)
Lasiurus cinereus
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Larch Mountain Salamander (Modeled Habitat)
Plethodon larselli
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Long-legged Myotis (Modeled Habitat)
Myotis volans
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Northern Goshawk (Modeled Habitat)
Accipiter gentilis atricapillus
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Northern Red-legged Frog (Observed)
Rana aurora
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Northern Spotted Owl (Modeled Habitat)
Strix occidentalis caurina
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Olive-sided Flycatcher (Observed)
Contopus cooperi
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Oregon Slender Salamander (Observed)
Batrachoseps wrighti
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Oregon Vesper Sparrow (Observed)
Pooecetes gramineus affinis
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Purple Martin (Observed)
Progne subis arboricola
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Red Tree Vole (Modeled Habitat)
Arborimus longicaudus
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Short-eared Owl (Modeled Habitat)
Asio flammeus flammeus
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Silver-haired Bat (Modeled Habitat)
Lasionycteris noctivagans
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Steelhead / Rainbow / Redband Trout (Documented)
Oncorhynchus mykiss ssp
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Townsend’s Big-eared Bat (Modeled Habitat)
Corynorhinus townsendii
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Western Bluebird (Observed)
Sialia mexicana
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Western Gray Squirrel (Observed)
Sciurus griseus
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Western Meadowlark (Observed)
Sturnella neglecta
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Western Painted Turtle (Observed)
Chrysemys picta bellii
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Northwestern Pond Turtle (Observed)
Actinemys marmorata
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Western Toad (Modeled Habitat)
Anaxyrus boreas
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White Rock Larkspur (Observed)
Delphinium leucophaeum
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White-breasted Nuthatch (Observed)
Sitta carolinensis aculeata
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Willow Flycatcher (Observed)
Empidonax traillii
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Winged Floater Freshwater Mussel (Observed)
Anodonta nuttalliana
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Yellow-breasted Chat (Observed)
Icteria virens auricollis