We are writing on behalf of Sierra Forest Legacy, a project of the Tides Center; Center for Biological Diversity; and Defenders of Wildlife to notify you of violations of Section 4 of the Endangered Species Act (“ESA”), 16 U.S.C. § 1533, by the U.S. Fish and Wildlife Service (“Service”) in determining that listing the California spotted owl under the ESA is not warranted. See 84 Fed. Reg. 60371 (Nov. 8, 2019). This letter is provided pursuant to the sixty-day notice requirement of the citizen suit provision of the ESA, 16 U.S.C. § 1540(g).