The solo student pilot reported that during a day visual meteorological condition flight, in the landing flare he saw a deer where he intended to touch down. He further reported that he banked to the right and applied power to go-around, but during the turn to the right he was unable to clear a line of trees in his flight path. The student pilot reported that the landing gear "scraped" one line of trees, and in order to avoid a thicker line of trees ahead, he forced the airplane down into a marsh area. The fuselage and both wings sustained substantial damage. The pilot did not report any mechanical malfunctions or failures with the airplane that would have precluded normal operation. During a postaccident interview with an airport representative, he reported that the airport does not a have a perimeter fence. The Federal Aviation Administration Chart Supplement airport page for the accident airport in part states: "Deer and birds on and invof [in the vicinity of] arpt."