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U.S. Public Lands and Rivers Conservation

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Conserving Wildlife Migration Corridors Saves Lives and Wildlife, Boosts Local Economies
Conserving Wildlife Migration Corridors Saves Lives and Wildlife, Boosts Local Economies

Wildlife migration—the act of traveling between seasonal habitats—is widespread among terrestrial species, including many culturally and economically important animals such as mule deer, elk, and pronghorn antelope. However, their ancient routes—which can be thousands of years old—are increasingly crossed by busy roads, subdivisions, and energy development.

The resulting disruption has significant human, economic, and ecological consequences. According to the U.S. Department of Transportation, vehicles collide with as many as 2 million large animals each year, resulting in approximately 200 human deaths, 26,000 injuries, and property damage and other costs totaling at least $8 billion annually. And big game herds are declining in several Western states such as Wyoming, where populations of mule deer have plummeted by 40% since 2000.

However, recent advances in science and technology are revolutionizing the way that scientists, policymakers, agency officials, and communities see and understand how wildlife moves across landscapes, providing a critical opportunity to protect essential corridors, wildlife, motorists, and property.

For more information on Pew’s work with partners to conserve key wildlife migration corridors, see the resources below.

Mule deer staring a fence in snow overpass
Mule deer staring a fence in snow overpass
Opinion

A Model to Conserve Wildlife Migrations on Working Lands

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Opinion

America’s wildlife is a national treasure. From mule deer to monarchs, the natural world supports human life, fosters a deep sense of connection to nature’s bounty and serves as the backbone of our $454 billion outdoor recreation economy—boosting tourism, generating gear purchases and supporting local jobs.

Grand Teton Pronghorn crossing a street along their migration route
Grand Teton Pronghorn crossing a street along their migration route
Article

Congress Should Conserve Migration Routes

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Article

On Nov. 15, 2021, wildlife advocates cheered the signing into law of the Infrastructure Investment and Jobs Act and a provision within it that established a wildlife safety crossing program.

OUR WORK

A line of brown female elk walk from left rear to right front along a deep path in snow with snow-flecked fir trees, blue sky, and puffy clouds in the background.
aA line of brown female elk walk from left rear to right front along a deep path in snow with snow-flecked fir trees, blue sky, and puffy clouds in the background.
Article

Wildlife Migrations in the U.S. Sustain Ecosystems

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Article

Each year, millions of mule deer, elk, pronghorn, and other large ungulates (hoofed mammals) traverse the vast landscape of the American West. In recent years, GPS technology, in the form of collars affixed to individual animals, has revolutionized scientists’ understanding of these migrations by enabling researchers to pinpoint when, where, and how wildlife moves at a grand scale.

White Paper

States Can Help Pay for New Wildlife Crossings

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White Paper

Wildlife crossing infrastructure, including overpasses and underpasses, has proved highly effective in connecting wildlife habitat areas separated by roadways and preventing wildlife-vehicle collisions, but despite this, states lack sustained funding to support new projects.