Skip to main content
Unsupported Browser Detected

Internet Explorer lacks support for the features of this website. For the best experience, please use a modern browser such as Chrome, Firefox, or Edge.

Endangered and Threatened Wildlife and Plants; Listing Endangered and Threatened Species and Designating Critical Habitat


Endangered Species Act
Action Status
Proposed Rule


We, the U.S. Fish and Wildlife Service and the National Marine Fisheries Service, propose to revise portions of our regulations that implement section 4 of the Endangered Species Act of 1973, as amended. The proposed revisions to the regulations clarify, interpret, and implement portions of the Act concerning the procedures and criteria used for listing, reclassifying, and delisting species on the Lists of Endangered and Threatened Wildlife and Plants and designating critical habitat.

Last updated by Office of Protected Resources on 06/22/2023