A district court denied federal agencies' motion to dismiss a long-running dispute concerning impacts of hydropower dam operations on endangered steelhead and salmon in the Columbia and Snake…

The Ninth Circuit affirmed in part and reversed in part a district court ruling in a challenge to NMFS' issuance of critical habitat designations for two species of Arctic seal. The state of…

A district court granted motions for preliminary injunction brought by environmental groups, fishing groups, tribes, and the state of Oregon in a long-running dispute over the Army Corps of…

The Ninth Circuit vacated a district court's mandatory preliminary injunction requiring a California county to take certain actions in its management of a dam and reservoir. Environmental groups…

A district court granted summary judgment for an environmental group in an ESA citizen suit challenging the California Department of Parks and Recreation's authorization of off-highway vehicle use…

A district court granted summary judgment for environmental groups in a challenge to FWS' 2022 ESA rule affirming a 2013 rule that listed the streaked horned lark as a threatened species and…

The D.C. Circuit affirmed summary judgment for FWS in a challenge to its rejection of a petition to remove the southwestern willow flycatcher from the list of endangered subspecies. A group of…

A district court granted in part and denied in part summary judgment for property owners in a challenge to FWS' 2020 final rule designating ESA critical habitat for the black pinesnake. Timberland…

A district court granted FWS' motion to vacate and remand its 2022 rule listing the northern distinct population segment (DPS) lesser prairie-chicken as threatened and the southern DPS of the…

A district court ruled for environmental groups in a challenge to FWS' 2024 finding that listing a distinct population segment (DPS) of gray wolves in the western United States under the ESA was…