I am looking for any data on any insects using horizons for orientating. I heard that someone (Ruttner?) discussed some years ago that honey bee drones used horizons and other shaarply delineated landmarks for flight orientation. Know any references or unpublished work?? Thank you for your help! ================================================================== º Edward E. Southwick Department of Biology º º Phone 716-395-5743 State University of New York º º FAX 716-395-2416 Brockport, New York 14420 º º BITNET SOUTHWIK@BROCK1P U.S.A. º ==================================================================