On Monday the Bozeman Daily Chronicle's Michael Wright reported that more than 570 Yellowstone National Park bison have been killed so far this winter. The Park is trying to reduce the size of its bison herd from an estimated 5,500 animals to about 3,000.
The annual slaughter happens as part of compromise between the Park Service and State of Montana, which says bison numbers need to be controlled to prevent the spread of the disease brucellosis to cattle. It's controversial, and there is an alternative.
Joining us now to talk about it is Amy Martin, who spent the last year reporting on bison for her podcast: Threshold.