Environmentalists say they intend to sue U.S. officials unless more is done to protect threatened bull trout.
A formal 60-day notice of their intent to sue was filed Thursday by the Cottonwood Environmental Law Center, WildEarth Guardians, Cascadia Wildlands and the Western Watersheds Project.
The groups say the Bureau of Land Management and U.S. Forest Service failed to evaluate the consequences of projects approved within bull trout habitat.
The bull trout has disappeared from half its historical range in Oregon, Washington, Montana and Nevada due to habitat loss from logging, mining, dams and livestock grazing.
A separate case involving bull trout is pending in federal court in Oregon, where environmentalists sued federal officials in April for failing to develop recovery plans for the fish.