Case: Commonwealth of Massachusetts v. United States Fish And Wildlife Service

4:26-cv-10072 | U.S. District Court for the Northern District of California

Filed Date: Sept. 9, 2026

Case Ongoing

Clearinghouse coding in progress

Case Summary

[This summary is temporary while we research the case.]

This case challenges two FWS rules that eliminate automatic protections for newly listed threatened species and expand the process for excluding areas from critical-habitat designations. Plaintiffs allege that the rules unlawfully weaken species and habitat protections in violation of the ESA, APA, and NEPA.
 

People

For PACER's information on parties and their attorneys, see: https://www.courtlistener.com/docket/74766354/parties/commonwealth-of-massachusetts-v-united-states-fish-and-wildlife-service/

Attorney for Plaintiff

Arizona, State of (California)

Breidenbach, Christopher G. (California)

California, State of (California)

Colorado, State of (California)

Columbia, District of (California)

Documents in the Clearinghouse

No documents yet available via the Clearinghouse.

Docket

See docket on RECAP: https://www.courtlistener.com/docket/74766354/commonwealth-of-massachusetts-v-united-states-fish-and-wildlife-service/

Last updated Sept. 13, 2026, 3:05 a.m.

Docket for: Commonwealth of Massachusetts v. United States Fish And Wildlife Service
ECF Number Date Description Link
1 Sept. 9, 2026

COMPLAINT FOR DECLARATORY RELIEF against All Defendants ( Filing fee $ 405, receipt number ACANDC-22439538.). Injunction against the US government/official or APA vacatur requested. Filed by State of California. (Loda, Jennifer) (Filed on 9/9/2026) (Entered: 09/09/2026)

RECAP
2 Sept. 10, 2026

Case assigned to Magistrate Judge Ajay S. Krishnan. Counsel for plaintiff or the removing party is responsible for serving the Complaint or Notice of Removal, Summons and the assigned judge's standing orders and all other new case documents upon the opposing parties. For information, visit E-Filing A New Civil Case at http://cand.uscourts.gov/ecf/caseopening.Standing orders can be downloaded from the court's web page at www.cand.uscourts.gov/judges. Upon receipt, the summons will be issued and returned electronically. A scheduling order will be sent by Notice of Electronic Filing (NEF) within two business days. Consent/Declination due by 9/24/2026. (dso, COURT STAFF) (Filed on 9/10/2026) (Entered: 09/10/2026)

RECAP
5 Sept. 11, 2026

MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-22450355.) filed by State of Colorado. (Breidenbach, Christopher) (Filed on 9/11/2026) (Entered: 09/11/2026)

RECAP
6 Sept. 11, 2026

MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-22450407.) filed by State of Colorado. (Noteboom, Carrie) (Filed on 9/11/2026) (Entered: 09/11/2026)

RECAP

Case Details

State / Territory:

California

Case Type(s):

Environmental Justice

Special Collection(s):

Trump Administration 2.0: Challenges to the Government

Key Dates

Filing Date: Sept. 9, 2026

Case Ongoing: Yes

Case Details

Other Dockets:

Northern District of California 4:26-cv-10072

Available Documents:

Complaint (any)

Trial Court Docket

Recommended Citation