Fig. 5. Gait diagrams for transitional locomotion sequences in Taricha. Bars indicate periods during which the foot is on the ground. Thin bars indicate one S.E.M. of foot placement or lifting. LH, left hindfoot; LF, left forefoot; RF, right forefoot; RH, right hindfoot. (A) Water-to-ramp: transition between swimming/underwater walking and terrestrial walking. Thin gray lines separate strides. The light gray region indicates the stride during which the feet leave the water; the dark gray region indicates the stride in which all feet had left the water. Note decreasing variation in footfalls (shorter error bars) as the animal leaves the water. Mean of 20 sequences. (B) Ramp-to-water: transition between walking and swimming. Thin gray lines separate strides. The light gray region indicates the stride during which the feet enter the water; the dark gray region indicates the stride in which all feet had entered the water. For ease of comparison with Up patterns, the Down sequence has been reversed. Note increasing variation in footfalls (longer error bars) as the animal enters the water. Mean of 20 sequences. The large arrows above each panel indicate the direction of motion.