Common Basilisk - Locomotion On Water

Locomotion On Water

The Common basilisk, along with the other members of its genus, take the nickname the "Jesus Christ Lizard" or "Jesus Lizard" because when fleeing from predators, they gather sufficient momentum to run across the water for a brief distance while holding most of their body out of the water (similar to the Biblical miracle of Jesus walking on water). Basilisks have large hind feet with scaly fringes on the sides of the third, fourth, and fifth toes. These are compressed against the toes when this lizard walks on land; but if the basilisk senses danger, they can jump into the water, opening up these fringes against the water's surface. This increases the surface area of the foot, thus allowing them to run on the water for short distances. The mechanics of this work in three steps. First there is the slap, this is the downward movement of the foot that pushes water out and away from the leg. This also created pockets of air around the foot. Next is the stroke, this is the backwards movement of the foot, which propels them forward. Next is the recovery, this is when the foot comes up and out of the water and prepares to do the slap again. Smaller basilisks can run about 10–20 m without sinking. Juveniles can usually run farther than older basilisks, while holding more of their body above the surface.