The Canada lynx is protected under the Endangered Species Act as a threatened species. ... Declines of lynx in the lower 48 states were due to trapping and timber harvests that removed, changed and fragmented habitat. Today, timber harvest, recreation and their related activities are the threats to lynx habitat.

https://www.fws.gov/midwest/endangered/mammals/lynx/index.html

https://www.nytimes.com/2020/04/08/science/lynx-endangered-species.html

https://wildlife.onlinelibrary.wiley.com/doi/10.1002/jwmg.21846

Climate change is likely the main reason for the declining population, he and other lynx experts said, driving a combination of factors: warmer temperatures, which the cold-adapted lynx don’t like; forest fires; and less snow cover, which reduces the animal’s competitive advantage and won’t support its main prey, the snowshoe hare.

https://thecanadianlynx.weebly.com/basic-information.html