To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Length of stimulus presentation and visual angle are critical for efficient visual PER conditioning in the restrained honey bee, Apis mellifera Leonie Lichtenstein, Matthias Lichtenstein, and Johannes Spaethe Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.179622 Download Original Video