Researchers at Boston U. made a Batcopter to fly into swarms of Mexican Freetail bats in Texas. The Batcopter has four electrically powered rotors. The whole thing is in a netting-covered frame. Some pictures showing the Batcopter, but no results of the study
http://www.gizmag.com/batcopter-uav-stu ... ght/18916/
and some more info
http://spectrum.ieee.org/automaton/robo ... or-science