Wisconsin re-opened its mourning dove hunting season yesterday following a two-year delay. The season was delayed because animal protection groups successfully sued to stop the hunt. An appeals court overturned that ruling earlier this year. That decision has also been appealed, but the state Supreme Court declined to delay the start of the hunt. Opponents of the hunt say the state legislature took the bird off the list of game species when it named the bird the state symbol of peace. That designation was made in 1971 at the urging of animal rights activists. Keith Warnke is a wildlife ecologist with the Wisconsin Department of Natural Resources and was among those hunting doves yesterday.