Montana Judge Blocks BLM Order to Remove Nearly 1,000 Bison from American Prairie

In a significant victory for conservation efforts and a blow to a controversial reinterpretation of federal grazing law, a U.S. District Court judge has temporarily halted an order from the Bureau of Land Management (BLM) that threatened to remove nearly 1,000 bison from public grazing leases managed by the nonprofit American Prairie. The preliminary injunction, issued by U.S. District Court Judge Brian Morris, allows the majestic bison to remain on the shortgrass prairie of Montana for now, delaying a removal deadline that was set for September 30th. This decision preserves a vital ecological component of the American Prairie Preserve and underscores the complex legal and ecological battles surrounding the reintroduction and management of bison on public lands.

The dispute originated from a May 2026 order by the BLM, which sought to revoke the grazing permits for the bison herd managed by American Prairie. The nonprofit organization oversees an expansive landscape encompassing over 600,000 acres, a mosaic of private land and federal grazing leases that are open to the public for recreational activities such as camping, wildlife viewing, and hiking. The BLM had initially granted these grazing permits in 2005, recognizing the ecological role of bison on these lands. However, the recent order was based on a novel reinterpretation of the Taylor Grazing Act, a foundational piece of legislation governing livestock grazing on federal lands. The BLM’s new interpretation sought to redefine "livestock" to exclusively mean "production-oriented" animals, effectively excluding bison managed for conservation and ecological restoration purposes.

Judge Morris, in his ruling, expressed strong reservations about the BLM’s narrow interpretation. He stated, "No statutory language or judicial precedent exists that requires a livestock operation to focus exclusively on production and entirely ignore conservation, range improvement, preservation, or other values." He further emphasized that "Congress recognized livestock grazing and livestock management often includes and considers preservation, improvement, and thoughtful development, hand-in-hand with other uses." This judicial rebuke directly challenges the BLM’s attempt to impose a rigid, production-centric definition that would have far-reaching implications for wildlife management and conservation initiatives across the Western United States.

The implications of the BLM’s original order were stark for American Prairie. Had the removal taken effect, the preserve would have faced the grim necessity of either culling or relocating hundreds of bison. Beth Saboe, American Prairie’s director of public relations, had previously expressed the organization’s deep concern. "Worst-case scenario, we potentially would have to get rid of hundreds of animals. We don’t want to see that happen," Saboe stated in May 2026, shortly after the BLM’s directive was announced. The organization had vowed to appeal any adverse final decision, underscoring the critical importance of the bison herd to their mission.

Beyond the significant financial burden of removing and managing such a large herd, Saboe highlighted the ecological ramifications. Removing bison from public range would have meant stripping a restorative species from its native habitat, disrupting a process that has been underway for decades. The uncertainty surrounding the herd’s future also had a tangible impact on conservation activities, leading to the cancellation of American Prairie’s public bison harvest for 2026, an event that typically contributes to herd management and provides economic opportunities.

The BLM’s revocation order, while supported by some entities like the Montana Stockgrowers Association and numerous local ranchers who often prioritize cattle operations, faced strong opposition from American Prairie’s tribal partners. These collaborations are crucial, as bison hold immense cultural and ecological significance for many Indigenous communities. In a January 2026 letter addressed to the Secretary of the Interior, J. Garret Renville, chairman of the Coalition of Large Tribes and the Sisseton-Wahpeton Oyate of the Lake Traverse Reservation, articulated the vital role American Prairie plays in supporting tribal conservation efforts. Renville pointed out that American Prairie had provided bison to and collaborated with numerous tribes seeking to establish or expand their own herds. He further noted that the organization’s methods of raising bison were "largely indistinguishable from the practices and techniques employed by tribal herd managers," highlighting a shared commitment to traditional ecological knowledge and bison restoration.

Judge Morris’s ruling specifically addressed the BLM’s rationale, stating that he "struggle[d] to see" how the agency’s decision to implement the new regulation while disregarding American Prairie’s evidence could be reconciled with existing law. The BLM’s redefinition of livestock aimed to restrict grazing to animals "used as part of an operation to provide output for various purposes, such as meat, milk, fiber, or other products and any animals when they are being used to assist with management of other animals in connection with such operations (e.g. horses that are used to assist with cattle management)." This narrow focus explicitly excludes the ecological and conservation functions that bison serve on the prairie.

Ironically, the BLM itself had previously acknowledged the benefits of bison grazing. In a 2022 decision, the agency concluded that bison grazing would indeed enhance rangeland productivity and riparian health on the very lands from which they now sought to remove the animals. This earlier assessment directly contradicts their subsequent order, raising questions about the agency’s motivations and decision-making process.

The potential consequences of losing bison grazing rights are significant. If American Prairie were ultimately denied the ability to graze bison, they might be compelled to replace them with cattle. However, scientific evidence suggests this would be detrimental to the ecosystem. Cattle herds are known for their tendency to overgraze specific areas before moving on, a behavior that can degrade grassland health. Bison, conversely, exhibit a more sustainable grazing pattern. They graze gradually while migrating across the landscape, covering distances of up to 2-3 miles per day. Studies have demonstrated that this migratory grazing behavior by bison can significantly enhance biodiversity and even improve drought tolerance in native grasslands.

"These are the ungulates that evolved with the prairie landscape," Saboe emphasized in May. "They’re one of the main keystone species here and that’s because of how their presence on the landscape improves the rangeland." This statement underscores the deep ecological understanding that underpins American Prairie’s work and highlights the integral role of bison as ecosystem engineers.

The preliminary injunction issued by Judge Morris specifically protects the three federal allotments where American Prairie’s bison are currently grazing. However, it did not extend to three other tracts where bison do not yet graze, leaving a degree of uncertainty for future expansion plans. Despite this limitation, the ruling represents a crucial reprieve.

Alison Fox, CEO of American Prairie, expressed her relief and optimism. "Bison belong on this landscape, and today’s ruling gives them a chance to stay," she stated. "For more than 20 years, our bison have grazed these lands under federal authorization and without grazing violations. The court recognized the concrete harm that removing them would cause, not just to our work, but to our Tribal partners and the broader effort to return bison to their native home."

The legal battle over the BLM’s reinterpretation of the Taylor Grazing Act and its impact on bison conservation is far from over. However, Judge Morris’s decision provides a critical breathing room, allowing American Prairie to continue its vital work of restoring a functioning grassland ecosystem with its keystone species. This ruling serves as a powerful reminder of the delicate balance between federal land management, private conservation initiatives, the ecological imperative of species restoration, and the critical importance of respecting the intricate relationships between wildlife and their native landscapes. The case also highlights the ongoing dialogue between traditional land management practices and modern conservation science, with tribal perspectives playing an increasingly vital role in shaping the future of conservation in the American West. The future of bison on American Prairie, and potentially across other federal lands, will hinge on the continued legal proceedings and the evolving understanding of the ecological value of these iconic animals.