Tongue-flicking is a sensory-gathering behavior used by snakes to deliver odorants to the vomeronasal organ. In the present study we provide a detailed description of environmental control and motor patterns of tongue-flicking in garter snakes, Thamnophis sirtalis. Tongue-flicks were monitored during prey extract trailing, foraging, delivery of air-borne odors and in an open field. Tongue-flick rates increased during airborne odor delivery and as a function of prey extract concentration during trailing, as previously reported. Motivation and prey consumption appeared to modify tongue-flick patterns since 1. tongue-flick rates were higher under foraging conditions than in an open field where no prior prey consumption had occurred and no prey odors were present; and 2. tongue-flick rates were elevated after prey consumption. The number of oscillations and the duration of tongue extensions were significantly reduced following tongue-substrate touches, suggesting that tongue contact with the substrate is the immediate stimulus for tongue retraction.
CITATION STYLE
Schulterbrandt, T. G., Kubie, J., von Gizycki, H., Zuri, I., & Halpern, M. (2008). Patterns of Tongue-Flicking by Garter Snakes (Thamnophis sirtalis) during Presentation of Chemicals under Varying Conditions. In Chemical Signals in Vertebrates 11 (pp. 345–356). Springer New York. https://doi.org/10.1007/978-0-387-73945-8_33
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