To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Cockroach optomotor responses below single photon level A. Honkanen, J. Takalo, K. Heimonen, M. Vahasoyrinki, and M. Weckstrom Journal of Experimental Biology 2014. 217:4262-4268; doi: 10.1242/jeb.112425 Download Original Video