This is the most southeastern COA in Oregon and shares borders with Idaho and Nevada. It includes significant sections of the main stem Owyhee River, the Middle Fork Owyhee River, Little Owyhee River, and Toppin Creek. Its northern extent includes the three forks confluence, and its western border abuts the Little Louse Canyon COA (205) and includes the Fort McDermitt Reservation. Areas of special biological interest include Lookout Butte Wilderness Study Area, Owyhee River Canyon Wilderness Study Area, Upper West Little Owyhee Wilderness Study Area, and the Toppin Creek Butte Area of Critical Environmental Concern/Research Natural Area.
COA ID: 206
Northern Basin and Range
The Northern Basin and Range ecoregion covers the very large southeastern portion of the state, from Burns south to the Nevada border and from the Christmas Valley east to Idaho. It is largely a high elevation desert-like area dominated by sagebrush communities and habitats.
Aspen woodlands are woodland or forest communities, dominated by aspen trees with a forb, grass, or shrub understory. Aspen woodlands can also occur within conifer forests.
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.
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 include all sagebrush steppe- and shrubland-dominated communities found east of the Cascade Mountains.
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.
California Myotis (Modeled Habitat)
Columbia Spotted Frog (Modeled Habitat)
Ferruginous Hawk (Modeled Habitat)
Greater Sage-Grouse (Observed)
Hoary Bat (Modeled Habitat)
Kit Fox (Modeled Habitat)
Long-billed Curlew (Observed)
Long-legged Myotis (Modeled Habitat)
Great Basin Redband Trout (Documented)
Oncorhynchus mykiss newberrii
Pallid Bat (Modeled Habitat)
Pygmy Rabbit (Modeled Habitat)
Silver-haired Bat (Observed)
Swainson’s Hawk (Observed)
Townsend’s Big-eared Bat (Modeled Habitat)
Burrowing Owl (Modeled Habitat)
Athene cunicularia hypugaea
Western Toad (Modeled Habitat)
Willow Flycatcher (Observed)