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Roar Wildlife News December 5, 2025 · Yellowstone Bison Make History: Two Herds Become One After more than a century of separation, Yellowstone National Park’s two iconic bison herds, the Northern Range and Central/Southern herds, have merged into a single, genetically unified population. Recent research shows that bison across the park now interbreed freely, breaking down the genetic barriers that once divided them. This milestone is being hailed as a major conservation success, ensuring the herd’s long-term health and resilience. While the old ranges still guide seasonal behavior, scientists can now manage Yellowstone bison as one continuous population, simplifying conservation efforts and highlighting the success of decades of careful wildlife management. The merging of these herds is more than a scientific milestone, it’s a triumph for one of North America’s most iconic species and a reminder of nature’s remarkable resilience.