Mexico restores American bison after 160-year absence

American bison have returned to Coahuila, Mexico, marking a significant milestone in continental ecosystem restoration efforts. The 47 animals now grazing in the region represent the first bison presence in Mexico since their extinction there in the mid-19th century, a gap spanning more than a century and a half.

The reintroduction programme forms part of a broader North American initiative focused on restoring keystone species that have vanished from their native habitats. Bison, as ecosystem engineers, are proving instrumental in revitalizing degraded landscapes across the arid terrain of northern Mexico.

Their ecological impact is multifaceted. The animals enhance soil quality through their grazing patterns and physical movement across the landscape, while simultaneously improving water absorption in the region's dry terrain. This transformation creates conditions conducive to broader ecosystem recovery.

Beyond their direct environmental impact, the bison herd is catalysing a cascade of ecological benefits. Their presence is facilitating the resurgence of native predators and other wildlife species that depend on the restored habitat. This interconnected recovery reflects the principle that reintroducing apex species can trigger comprehensive ecosystem rejuvenation across multiple trophic levels.

The project underscores growing recognition among conservation authorities that restoring lost megafauna remains essential to ecological health in North America.