[7] J.E. Treherne and W.A. Foster. Group transmission of predator avoidance behaviour in a marine insect: The Trafalgar effect. Animal Behaviour , 29:911–917, 1981. [8] A.J. Inman and J. Krebs. Predation and group living. Trends in Ecology & Evolution , 2:31–32, 1987. [9] W.D. Hamilton. Geometry for the selfish herd. Journal of Theoretical Biology , 31:295– 311, 1971. [10] W.A. Foster and J.E. Treherne. Evidence for the dilution effect in the selfish herd from fish predation on a marine insect. Nature , 293:466–467, 1981. [11] J.E. Treherne and W.A. Foster. Group size and anti-predator strategies in a marine insect. Animal Behaviour , 30:536–542, 1982. [12] C.C. Ioannou, V. Guttal, and I.D. Couzin. Predatory fish select for coordinated collec- tive motion in virtual prey. Science , 337:1212–1215, 2012. [13] Randal S. Olson, David B. Knoester, and Christoph Adami. Critical interplay between density-dependent predation and evolution of the selfish herd. In Proceedings of the Genetic and Evolutionary Computation Conference (GECCO) , pages 247–254, 2013. [14] Randal S. Olson, David B. Knoester, and Christoph Adami. Evolution of swarming behavior is shaped by how predators attack. arXiv e-print. http://arxiv.org/abs/1310.6012, 2014. [15] B.R.C. Bertram. In J. R. Krebs and N.B. Davies, editors, Behavioral Ecology: An Evolutionary Approach , pages 64–96. Blackwell, Oxford, 1978. [16] D.C. Krakauer. Groups confuse predators by exploiting perceptual bottlenecks: A connectionist model of the confusion effect. Behavioral Ecology and Sociobiology , 36:421– 429, 1995. 21