Pronghorn Welfare: North America's Fastest Land Animal Faces Modern Threats

Pronghorn are uniquely North American ungulates, capable of sustained speeds up to 88 km/h. Their long-distance migration routes are being severed by fences and development, causing welfare impacts from starvation to injury.

Key Facts

Pronghorn (Antilocapra americana) are the fastest land animal in the Western Hemisphere and the second-fastest in the world.
They evolved to outrun North American cheetahs and lions, now extinct — their speed is an evolutionary anachronism.
Some pronghorn populations undertake migrations of over 300 km between summer and winter ranges.
Standard livestock fences with bottom wires below 45 cm block pronghorn migration — they do not jump fences like deer.
The Path of the Pronghorn in Wyoming is North America's longest intact land migration route; development threatens its continuity.
Drought reduces forage quality and water availability, causing nutritional stress particularly for pregnant does and fawns.

Welfare Considerations

Pronghorn welfare is primarily determined by landscape connectivity and forage quality. Animals blocked by fences during winter migrations face starvation when snow covers low-elevation winter range. Fence-crossing attempts cause injuries from barbed wire entanglement. Drought years dramatically reduce fawn survival through maternal nutritional stress and predation vulnerability. Fence modification — raising bottom wires, replacing barbed wire with smooth wire in key corridors — is a low-cost, high-impact welfare and conservation intervention. Climate resilience planning for pronghorn ranges increasingly incorporates welfare science alongside population ecology.

What You Can Do

Support Pronghorn Project fence modification initiatives that create wildlife-friendly passages on ranchland.
Donate to Wyoming Migration Initiative and similar organisations mapping and protecting migration corridors.
Advocate for wildlife crossing infrastructure in pronghorn migration route planning processes.
Learn about the ecological history of North American megafauna and pronghorn's unique evolutionary story.
Support ranchers who voluntarily modify fences and manage grazing to accommodate pronghorn migration.