A hunting season for wolves proposed by the state Department of Natural Resources is likely to face a court challenge and could land the animal back on the endangered species list, according to a UW-Madison expert in predator-prey ecology who has spent 12 years studying wolf management in Wisconsin. The DNR?s wolf hunting plan “increases the risk that wolves will be returned to federally endangered status because it proposes untested methods in a very long season in too broad an area of the state,” warned Adrian Treves, an associate professor of environmental studies who has surveyed thousands of state residents on the issue.