About this Collection

We have developed a number of national policies and issued internal guidance to promote efficiency and consistency in our implementation of the Endangered Species Act (ESA). Below you will find links to summaries of our major policies related to species listing and critical habitat.

Policies and Regulations

Policy or Regulation Date Document
Endangered and Threatened Species Listing and Recovery Priority Guidelines September 21, 1983; November 15, 1983 - Correction 48 FR 43098; 48 FR 51985
Interagency Policy on Information Standards under the ESA July 1, 1994 59 FR 34271
Interagency Policy Regarding the Recognition of Distinct Vertebrate Population Segments Under the ESA February 7, 1996 61 FR 4722
Final Policy for Evaluation of Conservation Efforts When Making Listing Decisions March 28, 2003 68 FR 15100
Policy on Interpretation of the Phrase "Significant Portion of Its Range" in the ESA's Definitions of "Endangered Species" and "Threatened Species" July 1, 2014 79 FR 37577
Implementing Changes to the Regulations for Designating Critical Habitat February 11, 2016 81 FR 7414
Policy Regarding Implementation of Section 4(b)(2) of the Endangered Species Act February 11, 2016 81 FR 7226
Methodology for Prioritizing Status Reviews and Accompanying 12-Month Findings on Petitions for Listing Under the Endangered Species Act July 27, 2016 81 FR 49248
Revisions to the Regulations for Petitions September 27, 2016 81 FR 66462
Regulations for Prohibitions to Threatened Wildlife and Plants August 27, 2019 84 FR 44753
Regulations for Listing Species and Designating Critical Habitat August 27, 2019 84 FR 45020
Regulations for Listing Endangered and Threatened Species and Designating Critical Habitat December 16, 2020 85 FR 81411
Regulations for Designating Critical Habitat December 18, 2020 85 FR 82376