The High Desert Ecosystem
The Wyoming parcel sits within the Wyoming Basins ecoregion, a vast high-desert ecosystem that spans most of southern Wyoming and parts of adjacent states. The dominant vegetation is big sagebrush (Artemisia tridentata) with a diverse understory of native grasses, forbs, and shrubs. This ecosystem supports a remarkable variety of wildlife adapted to the cold, dry conditions.
Large Mammals
Mule Deer (Odocoileus hemionus)
The most common large mammal on the property and throughout Sweetwater County. Mule deer are browsers that feed on sagebrush, rabbitbrush, and other shrubs. They are most active at dawn and dusk, and especially visible during the fall rut (October-November). Wyoming Game and Fish manages mule deer populations through annual hunting seasons.
Pronghorn Antelope (Antilocapra americana)
Sweetwater County lies within the heart of pronghorn range. Pronghorn are the fastest land mammals in North America, capable of running 55 mph. They are typically seen in small herds grazing on open rangeland. Wyoming supports roughly 40% of the continental pronghorn population.
Elk (Cervus canadensis)
Elk are present in Sweetwater County, particularly in areas with nearby forested mountains. The herd along the southern Wind River Range occasionally moves through the high desert. Elk are larger than deer and are managed through limited-draw hunting tags.
Moose (Alces alces)
Less common than deer or pronghorn but present in areas with willow and aspen along streams and wetlands. Moose are browsers and prefer riparian habitat.
Mountain Lion (Puma concolor)
Present but rarely seen. Mountain lions are solitary, nocturnal predators that follow deer populations. They pose little threat to humans but are a consideration for livestock.
Black Bear (Ursus americanus)
Occasionally sighted, particularly in areas closer to forested mountains. Black bears are omnivorous and feed on berries, insects, and small mammals.
Small Mammals
The high desert supports a rich community of small mammals:
- Coyote (Canis latrans) — abundant, opportunistic predator
- Red fox (Vulpes vulpes) — present in lower densities
- Bobcat (Lynx rufus) — present but secretive
- Badger (Taxidea taxus) — common, distinctive black-and-white face
- Black-tailed jackrabbit (Lepus californicus) — abundant
- White-tailed prairie dog (Cynomys leucurus) — present in colonies
- Wyoming ground squirrel (Urocitellus elegans) — abundant
- Least chipmunk (Neotamias minimus) — common
- Deer mouse (Peromyscus maniculatus) — abundant
- Sagebrush vole (Lemmiscus curtatus) — sagebrush obligate
- Pygmy rabbit (Brachylagus idahoensis) — sagebrush obligate, federally listed as a species of conservation concern in adjacent states
Birds
Sweetwater County is a major flyway for migratory birds and supports breeding populations of sagebrush-obligate species:
Sagebrush Obligates
- Greater sage-grouse (Centrocerus urophasianus) — federally listed as a species of conservation concern. Wyoming is the stronghold of the species, with Sweetwater County hosting significant leks (breeding display grounds).
- Brewer's sparrow (Spizella breweri) — sagebrush obligate
- Sage thrasher (Oreoscoptes montanus) — sagebrush obligate
- Sagebrush songbird complex — multiple species dependent on sagebrush habitat
Raptors
- Golden eagle (Aquila chrysaetos) — common, often seen soaring
- Bald eagle (Haliaeetus leucocephalus) — winter visitor near water
- Ferruginous hawk (Buteo regalis) — largest North American hawk, sagebrush obligate
- Swainson's hawk (Buteo swainsoni) — summer breeder
- American kestrel (Falco sparverius) — common small falcon
- Great horned owl (Bubo virginianus) — common nocturnal raptor
- Burrowing owl (Athene cunicularia) — present in prairie dog colonies
Waterfowl and Other Birds
- Mallard (Anas platyrhynchos) — near water
- Canada goose (Branta canadensis) — seasonal migrant
- Western meadowlark (Sturnella neglecta) — Wyoming state bird, abundant
- Common raven (Corvus corax) — abundant
- Horned lark (Eremophila alpestris) — common
- Mountain bluebird (Sialia currucoides) — common summer breeder
Reptiles & Amphibians
- Western rattlesnake (Crotalus oreganus) — present, especially in rocky areas. Caution advised.
- Gopher snake (Pituophis catenifer) — non-venomous, often mistaken for rattlesnake
- Short-horned lizard (Phrynosoma hernandesi) — sagebrush habitat
- Painted turtle (Chrysemys picta) — near water only
- Boreal toad (Anaxyrus boreas) — sensitive species, near water
- Tiger salamander (Ambystoma tigrinum) — near water
Fish
The property itself has no permanent water and no fish habitat. However, the region offers excellent fishing:
- Green River (15 miles south) — blue-ribbon trout fishery, including brown trout, rainbow trout, and cutthroat trout
- Flaming Gorge Reservoir (60 miles west) — kokanee salmon, lake trout, rainbow trout, smallmouth bass
- Seedskadee National Wildlife Refuge (40 miles west) — fishing for trout and other species
- Numerous small lakes and reservoirs — trout, bass, walleye
Vegetation
The high-desert vegetation on and around the property is dominated by:
Shrubs
- Big sagebrush (Artemisia tridentata) — the dominant shrub
- Wyoming big sagebrush (A. t. wyomingensis) — a subspecies
- Mountain big sagebrush (A. t. vaseyana) — at higher elevations
- Black sagebrush (Artemisia nova) — on shallow soils
- Rubber rabbitbrush (Ericameria nauseosa) — yellow-flowered fall bloomer
- Greasewood (Sarcobatus vermiculatus) — on alkaline soils
- Fourwing saltbush (Atriplex canescens) — widespread
Grasses
- Bluebunch wheatgrass (Pseudoroegneria spicata) — native bunchgrass
- Western wheatgrass (Pascopyrum smithii) — rhizomatous
- Indian ricegrass (Achnatherum hymenoides) — important native
- Needle-and-thread grass (Hesperostipa comata) — characteristic
- Sandberg bluegrass (Poa secunda) — early season
- Thick-spike wheatgrass (Elymus lanceolatus) — rhizomatous
Forbs
- Arrowleaf balsamroot (Balsamorhiza sagittata) — yellow spring bloomer
- Indian paintbrush (Castilleja linariifolia) — Wyoming state flower
- Lupine (Lupinus spp.) — purple spring bloomer
- Sego lily (Calochortus nuttallii) — white lily
- Aster (Symphyotrichum spp.) — fall bloomers
- Penstemon (Penstemon spp.) — multiple species
Conservation Considerations
The Wyoming high desert is a fragile ecosystem that recovers slowly from disturbance. Property owners are encouraged to:
- Preserve native vegetation — avoid clearing sagebrush unless necessary for building sites or fire mitigation
- Minimize soil disturbance — use existing roads and trails
- Control invasive species — cheatgrass, halogeton, and Russian thistle are major concerns
- Protect water sources — even small seeps and springs are critical for wildlife
- Avoid pesticides — they can harm sage-grouse and other sagebrush obligates
Hunting & Fishing Notes
For property owners interested in hunting, Wyoming offers excellent opportunities. Hunters must obtain appropriate licenses and tags from the Wyoming Game and Fish Department. Elk and deer tags are typically allocated through a lottery draw system. Pronghorn and sage-grouse tags are more available. Fishing licenses are available for residents and non-residents.
The Wyoming Game and Fish Department publishes annual regulations, including season dates, bag limits, and tag requirements. Property owners should review current regulations before hunting on or near their property.