The pilot reported that during the landing flare, he noticed a deer (or possibly several deer) move onto the runway. In response, he added power and attempted to maneuver away from the animal(s). The airplane impacted what he believed to be a deer. The pilot retarded the engine power thinking that the airplane had likely incurred damage that would hinder further flight to complete a go-around. The left wing sustained substantial damage to the leading edge. The pilot reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation

The Federal Aviation Administration Airport Facilities Directory for the airport contained a note stating that there are deer occasionally on the runway.