The Compelling Case: North American Wild Horses Survived The Ice Age In Splinter Populations And Are More “American” Than Bison, Elk, Or Deer

If the science continues to bear this out, then much of what passes for wild horse “management” may prove less about conservation and more about institutional convenience, shaped by economics and politics rather than ecological humility. On matters of biodiversity, false premises are dangerous things; once government builds policy atop them, the land—and the creatures upon it—often pay the price.

NOTE: this article  was shared with us for distribution by Capt. William E. Simpson II - USMM Ret.

American wild horses (Equus caballus) are not an invasive species introduced by Europeans. They are one of the oldest continuous native large mammals on the continent — far older than the Indigenous peoples who arrived from Asia approximately 15,000–40,000 years ago, or the bison, elk, and deer that crossed the Bering Land Bridge in waves beginning roughly 200,000 years ago.
The horse family (Equidae) evolved in North America over 55 million years ago. While most large mammals disappeared at the end of the Pleistocene (~11,000 years ago), multiple lines of evidence now prove that splinter populations of caballine horses survived the Ice Age and persisted into the Holocene in North America.

*Direct Scientific Evidence of Holocene Survival

Murchie et al. (2021) – Nature Communications (University of Alberta / Yukon paleogenomics team) 

• Sedimentary ancient DNA (sedaDNA) from permafrost cores in northern North America shows Equus persisting thousands of years after the supposed fossil extinction: “The youngest signatures for Equus … (ca. 5700 cal BP) … imply local survival of these taxa long after the Pleistocene-Holocene transition.”

Taylor et al. (2023) – Science, Environmental DNA analysis confirms horse presence in arctic zones “as late as 5000 to 6000 years before the present.” Ross MacPhee (Curator Emeritus, American Museum of Natural History)

• “Horses survived at least in northern North America for thousands of years after the time of the big losses — at least up to about 5700 years ago.”
  Yvette Running Horse Collin (2017) – PhD Dissertation, University of Alaska Fairbanks
• “The results of this thesis conclude that the Indigenous horse of the Americas survived the ‘Ice Age’ and the original Peoples of these continents had a relationship with them from Pleistocene times to the time of ‘First-Contact.’”
• Claire Henderson (1991) – Laval University, “The Aboriginal North American Horse” Dakota/Lakota oral histories and ethnohistorical records confirm horses never disappeared after the Ice Age and were part of pre-contact Indigenous culture.
• Michael Hofreiter & related genomic studies
• The Late Pleistocene “Yukon horse” (Equus lambei) is genetically indistinguishable from modern Equus caballus.

*Spanish Horses Were a Later Addition — Not the Origin

• Spanish re-introductions (beginning 1519–1521 with Cortés) brought larger, cavalry-bred horses (compared to 'Indian Ponies' observed and documented by early French explorers) suited to mounted conquistadors. These animals were added to existing native populations. It is logistically impossible for them to have feralized, crossed 3,000 miles of mountains, deserts, major rivers, and territories occupied by tens of millions of Indigenous peoples (who captured loose livestock), and then appeared as fully integrated herds on the Oregon–California border by Drake’s documented 1579 sighting — 101 years before the Pueblo Revolt of 1680, the event historians traditionally cite as the moment horses first became widely available to northern tribes.

*The BLM’s Documented Misinformation and Economic Motive

• The Bureau of Land Management has repeatedly lied in official documents to Congress. In the 2018 “Path Forward” Report to Congress (Executive Summary, p. 1), the BLM stated in writing:
• “Wild horses and burros have no natural predators and herds can double in size every 4 years.”
• This is false. Recent university studies prove wild horses are a major prey species for apex predators:
• Andreasen et al. (2021, University of Nevada Reno): “Diets of cougars … were composed predominantly of horses (59.6%).”
• Iacono et al. (2024): “79% of collared cougars preyed on horses across all age and sex classes.”
• The BLM’s false narrative — “no natural predators,” “invasive species,” “must be managed/removed” — is driven by economic incentives. Labeling horses “invasive” justifies roundups, long-term holding (~$150 million/year taxpayer cost), fertility control contracts, and eventual extermination before they can be rightfully protected as an endangered native North American species. This myth has been repeated so often it has become “accepted fact,” despite being contradicted by genetics, ancient DNA, ethnohistory, and direct predator-prey studies.
  
  Conclusion
  
  North American wild horses are more 'American native' than the Indigenous peoples, bison, elk, or deer. They evolved here, survived the Ice Age in splinter populations, and were already present when Spanish horses arrived as a later addition. The BLM’s documented lies serve a clear economic purpose: to maintain the false “invasive species” label and prevent legal protections. The science is now unequivocal. It is time to correct the record and recognize America’s wild horses for what they truly are — one of our oldest and most iconic native species.
  
  References
  Murchie et al. (2021). Nature Communications.
  Taylor et al. (2023). Science.
  Collin, Y.R.H. (2017). PhD Dissertation, University of Alaska Fairbanks.
  Henderson, C. (1991). “The Aboriginal North American Horse,” Laval University.
  Andreasen et al. (2021). Journal of Wildlife Management.
  BLM (2018). Report to Congress: Management Options for a Sustainable Wild Horse and Burro Program.
  MacPhee, R. (multiple statements, 2021–2023). American Museum of Natural History.
  
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  Capt. William E. Simpson II - USMM Ret.
  Founder - Exec. Director - Wild Horse Fire Brigade
  Ethologist - Author - Conservationist
  Wild Horse Ranch
  P.O. Bx. 202 - Yreka, CA 96097
  Phone: 858. 212-5762
  Wild Horse Fire Brigade (https://www.wildhorsefirebrigade.org/)