They started giving birth control vaccines to the female ... It will be with a whimper, not a bang that the last of the buffalo dies. The post Bison Are Dying Off Rapidly On One Island Where ...

But the operation was costly, as well as potentially dangerous for both the bison and humans. So the Conservancy began looking toward a very different kind of herd management: birth control.

This is the third lawsuit to be filed in the wake of Yellowstone revising its bison management plan last year.