In 2017, the Humane Society of the United States (HSUS) released a report titled “State of the Mountain Lion—A Call to End Trophy Hunting of America’s Lion.” In the report, HSUS calls for an end to mountain lion hunting in the United States based on several scientific arguments. These arguments range from citing available literature on demography, ecology, and sociality of mountain lions, to the protection of potential habitat and population sizes across 16 states where breeding populations exist.