Federal judge tells Fish & Wildlife Service to think again about refusing Yellowstone bison endangered status

The Watersheds Project and the Buffalo Field Campaign have advocated since 2014 to have the Yellowstone bison herds declared endangered or threatened, arguing that the two separate groups of bison in the park are genetically distinct from one another, citing a study from that year. They are attempting to expand the limit on bison population in the park from 3,000 total, to 3,000 for each herd, the Billings Gazette explained.