Fig. 3. Tripod gait of a Cataglyphis individual before (normal) and after leg shortening (stumps II). The six complete strides captured by the high-speed video are shown, and indicated as the tripods performed by the animal in its normal tripod gate. Tripods formed by the left front and hind (L1, L3) and right middle (R2) legs are drawn in blue; those formed by the right front and hind (R1, R3) and left middle (L2) legs are drawn in red. Stride length (s2) was determined as the distance between two successive middle leg footfalls. (A) Untreated normal situation, showing the typical tripod gait (s2=13.3 mm; v=0.28 m s^-1). (B) After leg shortening the ant still shows the typical tripod gait but with obviously decreased stride length (s2=10.5 mm; v=0.27 m s^-1). Single video frames of the ant, taken during the 1st and 6th captured strides, are pasted into the tripod analysis.