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Footdrumming and other anti-predator responses in the bannertail kangaroo rat (Dipodomys spectabilis)

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Summary

Anti-predator behaviors of the bannertail kangaroo rat (Dipodomys spectabilis) toward snake predators were investigated. We induced responses by presenting a live (tethered) snake and an inflatable snake decoy to rats of known ages and sex in their territories. Comparisons of behaviors during spontaneous activity (baseline), naturally occurring snake-rat interactions, and experimental procedures further clarified anti-predator behaviors. The tethered snake immediately induced high rates of footdrumming (the repeated striking of the hind feet on the ground) in all rats (n=24) (Table 2), and individuals of both sexes and all ages footdrummed significantly more at the tethered snake than at the decoy. Other antipredator behaviors included alert postures, jumpback, kicking sand and avoidance. Juvenile rats exhibited more avoidance behavior and alert postures than adults and footdrummed at the decoy only if they experienced the snake first. We conclude that footdrumming functions as an individual alarm signal against predation by snakes in D. spectabilis. The drumming probably informs a snake that it has been detected and may cause it to leave. Because rats did not footdrum in response to aerial predators (owls), we suggest that kangaroo rats use different anti-predator strategies that depend on the kind of threat and the type of predator.

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Randall, J.A., Stevens, C.M. Footdrumming and other anti-predator responses in the bannertail kangaroo rat (Dipodomys spectabilis). Behav Ecol Sociobiol 20, 187–194 (1987). https://doi.org/10.1007/BF00299732

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  • DOI: https://doi.org/10.1007/BF00299732

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