Fig. 11. Factors likely to have contributed to the design of the Jacky dragon tail-flick. The sensory properties of receivers (A) and the environmental conditions (B), interact to define signal conspicuousness. Important characteristics of receiver behaviour (C) include compensation for a limited (<360°) visual field by constant scanning of the environment and engagement of visual processing by other stimuli, such as predators and insect prey. These factors predict increased signal duration. Energetic cost (D) has probably selected for a reduced duty cycle. In addition, the tail-flick is less likely to compromise anti-predator responses than other motor patterns.

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