Tails stabilize landing of gliding geckos crashing head-first into tree trunks

This study investigates the unique landing mechanism of the gliding gecko (*Hemidactylus platyurus*) using high-speed video footage and dynamic modeling. Geckos were observed crashing head-first into tree trunks at high speeds, followed by a significant pitchback of their head and torso, stabilized by their hind limbs and tail. A mathematical model and robotic experiments demonstrated the crucial role of the tail in this "fall-arresting response (FAR)", reducing the adhesive foot forces needed for successful landings. Longer tails with an active tail reflex resulted in significantly lower foot forces compared to shorter tails, highlighting the tail's importance in stabilizing landings.

Robert Siddall, Greg Byrnes, Robert J. Full, Ardian Jusufi