The West Eugene Area COA (264 mi2) extends from Camas Swale north along the foothills of the Coast Range to Cox Butte, including the West Eugene wetlands. This COA is adjacent to the Upper Willamette River Floodplain and Upper Siuslaw COAs.
Ecoregions
Coast Range
Oregon's Coast Range, known for its dramatic scenery, is extremely diverse, with habitats ranging from open sandy dunes to lush forests and from tidepools to headwater streams. It follows the coastline and extends east through coastal forest to the border of the Willamette Valley and Klamath Mountains ecoregions
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.
Key Habitats
Grasslands
Grasslands include a variety of upland grass-dominated habitats, such as upland prairies, coastal bluffs, and montane grasslands.
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.
Natural Lakes
Natural lakes are relatively large bodies of freshwater surrounded by land that were formed through geological processes, such as glacial scouring, tectonic movements, volcanic activity and river meander cutoffs. In Oregon, natural lakes are defined as standing water bodies larger than 20 acres, including some seasonal lakes. Depth is not a reference for characterization of …
Oak Habitats
There are several oak habitat types in Oregon, where oaks comprise most of the canopy. These can include oak woodlands, oak forest, oak chaparral, and riparian oak. Oak savanna is covered in the Grasslands Key Habitat. Oaks may also co-dominate a canopy in oak/fir, oak pine, and oak hardwood habitats.
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
Wetlands are habitats that are inundated or saturated by surface water or ground water at a frequency and duration sufficient to support vegetation typically adapted for life in sodden soil conditions. While dominated by periods of inundation, the natural ecological cycle may also include dry intervals. Permanently wet habitats include backwater sloughs, oxbow lakes, peatlands, …
Species of Greatest Conservation Need
Acorn Woodpecker (Observed)
Melanerpes formicivorus
Bradshaw’s desert parsley (Observed)
Lomatium bradshawii
California Myotis (Observed)
Myotis californicus
Chipping Sparrow (Observed)
Spizella passerina
Clouded Salamander (Observed)
Aneides ferreus
Coastal Cutthroat Trout (Documented)
Oncorhynchus clarki clarki
Common Nighthawk (Observed)
Chordeiles minor
Fender’s Blue Butterfly (Observed)
Icaricia icarioides fenderi
Fringed Myotis (Observed)
Myotis thysanodes
Western Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus
Hoary Bat (Modeled Habitat)
Lasiurus cinereus
Kincaid’s lupine (Observed)
Lupinus oreganus
Lewis’s Woodpecker (Observed)
Melanerpes lewis
Northern Red-legged Frog (Observed)
Rana aurora
Northern Spotted Owl (Observed)
Strix occidentalis caurina
Olive-sided Flycatcher (Observed)
Contopus cooperi
Oregon Chub (Documented)
Oregonichthys crameri
Oregon Vesper Sparrow (Observed)
Pooecetes gramineus affinis
Western Purple Martin (Observed)
Progne subis arboricola
Short-eared Owl (Observed)
Asio flammeus flammeus
Silver-haired Bat (Modeled Habitat)
Lasionycteris noctivagans
Southern Torrent Salamander (Observed)
Rhyacotriton variegatus
Streaked Horned Lark (Observed)
Eremophila alpestris strigata
Townsend’s Big-eared Bat (Modeled Habitat)
Corynorhinus townsendii
Wayside aster (Observed)
Eucephalus vialis
Western Bluebird (Observed)
Sialia mexicana occidentalis
Western Gray Squirrel (Observed)
Sciurus griseus
Western Meadowlark (Observed)
Sturnella neglecta
Western Painted Turtle (Observed)
Chrysemys picta belli
Northwestern Pond Turtle (Observed)
Actinemys marmorata
Western Rattlesnake (Observed)
Crotalus oreganus oreganus
White-breasted Nuthatch (Pacific) (Observed)
Sitta carolinensis aculeata
White-topped aster (Observed)
Sericocarpus rigidus
Willamette daisy (Observed)
Erigeron decumbens
Willow Flycatcher (Observed)
Empidonax traillii
Yellow-breasted Chat (Observed)
Icteria virens auricollis