The Center for Biological Diversity, American Bird Conservancy, Conservation Council for Hawaii, Defenders of Wildlife, Natural Resources Defense Council, National Parks Conservation Association, Sierra Club, and WildEarth Guardians have filed suit against the Fish and Wildlife Service alleging that the agency’s 2020 promulgation of a new rule implementing section 4(b)(2) of the Endangered Species Act violates both the ESA itself and the Administrative Procedure Act.