If the bridge goes in and Marty does not move from his/her spot, we have materially accomplished the whole goal of the permitting and design process - to erect the bridge in an environmentally-sensitive area without disturbing the natural habitat.
There is also a frog that likes to hang out in the area right in the centerline in the steam bed. We've called him "Datum Frog." I think he will appreciate the shade of the new bridge too.