1. Poulton, E. B. The Colours of Animals: Their Meaning and Use (Kegan Paul, Trench, Trubner, London, 1890).
2. Edmunds, M. Defence in Animals: A Survey of Anti-predator Defences (Longman, Harlow, Essex, 1974).
3. Guilford, T. Am. Nat. 131, S7–S21 (1988).
4. Guilford, T. in Insect Defence: Adaptive Mechanisms and Strategies of Prey and Predators (eds Evans, D. L. & Schmidt, J. O.) 23–61 (State Univ. of New York Press, NY, 1990).
5. Mallet, J. & Singer, M. C. Biol. J. Linn. Soc. 32, 337–350 (1987).