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Fertility Control Programs

At AWHC, we’re not just advocating for change, we’re implementing it. Our in-the-wild management program for Nevada’s historic Virginia Range wild horses established the on-the-ground model for humane management or large wild horse populations on large tracts of land. The cornerstone of our program was remote darting of wild mares with a scientifically proven vaccine known as "PZP" to slow population growth rates and reduce population numbers over time. This approach provides a humane and cost effective alternative to rounding up and removing wild horses from their homes on the range. Read more about the Virginia Range Management Program here.

We’re also helping community groups adopt and implement this model of humane management for other populations of wild horses in the West including our close partnership with our coalition partner the Salt River Wild Horse Management Group outside of Phoenix, Arizona, and the Pine Nut Wild Horse Advocates in Gardnerville, NV.

Where to View Wild Horses and Burros

AWHC has created an interactive map which shows all of the wild horse and burro Herd Management Areas (HMAs) managed by the Bureau of Land Management (BLM) in the Western United States. The AWHC team plans to update the map quarterly with links to the work we are doing to help our wild horses in these areas.

As part of this effort, AWHC is asking that you send us your photos and updates (preferably as PDF or JPG files) to help expand the map with interesting data and graphics. Send them to