USFWS: Yellowstone NP bison do not need ESA protections

Yellowstone National Park bison will not be reviewed by the U.S. Fish and Wildlife Service for Endangered Species Act protection, as the agency doesn't believe there is evidence the species needs it.

In a brief statement placed in the Federal Register on Friday, the Service said, "the petitions do not present substantial scientific or commercial information indicating the petitioned action may be warranted for Yellowstone National Park bison. Because the petitions do not present substantial information indicating that listing Yellowstone National Park bison may be warranted, we are not initiating a status review of this species in response to the petitions."

https://www.nationalparkstraveler.org/2019/09/fish-and-wildlife-service-again-declines-review-yellowstone-bison-esa-protection