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U.S. District Court Vacates Gray Wolf
Delisting Rule
February 18, 2022
On February 10, 2022, a district court vacated and remanded the U.S. Fish and Wildlife Service's
(FWS's) rule (the delisting rule) that delisted-that is, removed from the list of endangered and
threatened species-certain gray wolf entities. The U.S. District Court for the Northern District of
California held that the rule violated the Endangered Species Act (ESA) and the Administrative Procedure
Act (APA) in a number of ways. For example, the court concluded that FWS could not delist an entity
solely because it determined the listed entity no longer met the definition of a species under the ESA and
that FWS must instead apply the ESA's explicit standards for delisting. The court also determined that
FWS had not offered a reasonable construction of the phrase significant portion of its range, which
appears in the ESA's definitions of endangered species and threatened species. This is not the first time a
court has invalidated FWS's interpretation of this phrase; in 2018, a court vacated FWS's 2014 joint
policy with the National Marine Fisheries Service (NMFS) interpreting the phrase.
The court's decision to vacate the delisting rule renders it void and effectively reinstates the listing status
that each gray wolf entity had before that rule was promulgated. The gray wolf therefore is again listed as
threatened in Minnesota and endangered elsewhere in the lower 48 states, except for the Northern Rocky
Mountain distinct population segment (DPS), which had been delisted by prior actions. Vacating the
delisting rule does not affect the listing status of the Northern Rocky Mountain DPS. The court's decision
may also affect FWS's decisions on two pending petitions related to listing gray wolf DPSs.
This Sidebar discusses the history of rules relating to gray wolves under the ESA, the court's recent
decision, and next steps for FWS.
Listing History of the Gray Wolf Under the Endangered Species Act
The gray wolf was first listed under the ESA's predecessor statute in 1967. In 1973, Congress enacted the
ESA, which requires FWS to list a species as endangered if it determines that the species is in danger of
extinction throughout all or a significant portion of its range and to list a species as threatened if it
determines the species is likely to become endangered within the foreseeable future throughout all or a
significant portion of its range. The ESA requires FWS to determine whether a species meets these
definitions by analyzing five factors describing potential threats to the species. Listing a species triggers
various requirements and protections under the ESA. The ESA does not specify a delisting process or
Congressional Research Service
https://crsreports. congress.gov
LSB10697
CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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