Migratory Big Game

Mule deer, elk, pronghorn, moose, and bighorn sheep all require room to roam. Protecting migratory pathways helps them all and benefits other species too.

Private lands provide vital pathways

The breathtaking Greater Yellowstone Ecosystem in Wyoming, Montana and Idaho depend on keeping working lands intact and profitable. This is because animals rely on private lands during their annual migrations.

Tracking studies show that elk, mule deer, pronghorn antelope, bighorn sheep and moose weave between public and private land depending on their seasonal habitat needs. Elk, for instance, forage in ranchers’ pastures during the winter, and females often calve in agricultural fields in the spring before moving to neighboring national parks or forests.


Migratory Big Game

The Distance 
Big game species travel 30 to 200 miles twice each year on well-trodden migration routes.

The Landscape 
Private lands comprise 30 percent, or six million acres, of the Greater Yellowstone Ecosystem in Wyoming, Montana and Idaho.

The Food Web
Migratory big game animals underpin a vast food web, supplying food for bears, wolves, ravens, foxes and eagles.

The Hazards 
Fences or roads present obstacles for migrating animals, injuring or killing hundreds of big game species each year.

The Opportunity
WLFW and partners help landowners make fences wildlife-friendly and compensates them for providing migratory habitat.

Wyoming Big Game Conservation Partnership

In 2022, WLFW launched a pilot program in Wyoming to streamline and stack Farm Bill resources. This program rewards landowners who are stewarding pathways for migrating wildlife.


Private rangelands are critical for elk during spring calving season


Mule deer migrate each spring and fall



Rewarding Ranchers

For the first time ever, the Big Game Conservation Partnership allows landowners to stack Farm Bill payments from both the Natural Resources Conservation Service and the Farm Service Agency.

It also offers a new type of incentive for producers: a habitat lease that provides annual payments for landowners who maintain intact rangelands for migrating wildlife.

The goal is to scale up this model to benefit migratory big game and landowners across the West. Our local partners in Wyoming include the Wyoming Game and Fish Department, the Wyoming Wildlife and Natural Resource Trust, and many others.

good for livestock & big game

Practices and Programs

Assurance and Assistance for Conservation

WLFW offers technical and financial assistance for landowners interested in adopting conservation practices.

Landowners who continue to manage their ranches using NRCS-prescribed conservation practices are ensured regulatory compliance under the Endangered Species Act for up to 30 years. These contractual assurances give producers the predictability they need to operate farms and ranches in the future.


Mule Deer



Bighorn Sheep

Elk foraging in sagebrush

Photo: Brianna Randall


Did you know that elk and sage grouse share 40 million acres of sagebrush habitat? Sagebrush country serves as both winter range and spring calving grounds for elk. These ungulates migrate as far as 90 miles twice each year

When grasses dry out in late summer, elk find protein in the buds of sagebrush. In the harshest part of winter, sagebrush poking through the snow becomes a life-saver food source. Plus, sagebrush's dark branches warm in the sun, melting the snow below to expose grasses. The branches also create air pockets in the snow, too, making it easier for elk to paw through drifts to find food.


Mule Deer Sagebrush by Susan Morse

Photo: Susan Morse

Mule Deer

Mule deer also eat sagebrush in the winter. That’s why you’ll often see them sharing space with sage grouse out on the range. They come down from mountains in fall to converge in lower elevation valleys. Then in the spring, they head back up into the mountains as grasses and flowers green up at higher elevations.

In Wyoming, conservation efforts have protected vital pathways where mule deer and sage grouse habitat overlap. 


Pronghorn antelope walking in the sagebrush

Photo: Tom Koerner, USFWS


Fast, sleek and powerfully muscled, the pronghorn (also called antelope) relies on intact corridors. These mammals migrate as much as 150 miles between winter and summer range. To survive harsh winters, they nibble sagebrush leaves poking up from the snow. Pronghorn can reach speeds of up to 60 mph as they race across wide-open sagebrush and grasslands. Found only in North America, the pronghorn is the second-fastest land animal in the world – only the cheetah can sprint faster.


Photo: Greg M. Peters


Moose are the largest and heaviest members of the deer family living in North America today. These massive mammals are generally solitary creatures. They eat both terrestrial and aquatic vegetation, and frequent wet habitats, like streams, ponds, or wetlands. Moose can reach heights of seven feet (at their shoulder!) and can weigh more than 2,000 pounds.

In the West, moose live mainly in the Northern Rockies.


Photo: NPS/Diane Renkin

Bighorn Sheep

Renowned for their ability to climb steep cliffs, bighorn sheep live throughout the Rocky Mountains. Soft, flexible hooves aid their mountain-climbing prowess. These agile creatures congregate in large herds. Both males and females grow horns, though females’ horns are smaller and have less curvature.

Scientists recognize three subspecies of bighorn sheep: Rocky Mountain, Desert, and Sierra Nevada. Bighorn sheep are often considered good indicators of ecosystem health due to their sensitivity to environmental pressures.


Success Stories

Real People, Real Success

“Through a habitat lease, ranchers can make a reasonable livelihood while also keeping habitat healthy and whole.”

Lesli Allison, Executive Director of Western Landowners Alliance