BOISE, Idaho (AP) — Four conservation groups that contend federal officials in Idaho are violating environmental laws by killing predators and other wildlife to protect livestock and crops have taken the first step to file a lawsuit.

Idaho-based Western Watersheds Project and three other groups sent a letter to the Idaho office of the U.S. Department of Agriculture's Wildlife Services that is a 60-day notice of their intention to sue in federal court. The letter sent last week requests that the agency cease activities and conduct an environmental analysis or a more involved environmental impact statement.

The groups say Wildlife Services is relying on outdated or uninformed information in killing wolves, bears, coyotes, beavers, badgers and other animals. Wildlife Services says it can't comment specifically about pending litigation.