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DOI/FWS RIN: 1018-BD96 Publication ID: Spring 2020 
Title: Endangered and Threatened Wildlife and Plants; Critical Habitat Designation for the Arizona Gartersnakes 

We are revising our proposed designation of critical habitat for the northern Mexican gartersnake (Thamnophis eques megalops) and narrow-headed gartersnake (Thamnophis rufipunctatus) under the Endangered Species Act, as amended. We originally proposed critical habitat for these species in July 2013. These snakes are found in Arizona, New Mexico, and Mexico, and are listed as threatened.


Agency: Department of the Interior(DOI)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Not subject to, not significant 
CFR Citation: 50 CFR 17   
Legal Authority: 16 U.S.C. 1531 et seq.   
Legal Deadline:
Action Source Description Date
NPRM  Judicial  settlement agreement  04/13/2020 
Action Date FR Cite
NPRM  04/28/2020  85 FR 23608   
NPRM Comment Period End  06/29/2020 
Final Action  06/00/2021 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Related RINs: Previously reported as 1018-AZ35 
Agency Contact:
Caitlin Snyder
Chief, Branch of Domestic Listing, Ecological Services Program
Department of the Interior
United States Fish and Wildlife Service
5275 Leesburg Pike, MS: ES,
Falls Church, VA 22041-3803
Phone:703 358-2673
Fax:703 358-1800