One unusual and very fast bug:) Because they have the unique ability to move about on the surface, water striders are known as “skaters,” “scooters,” or “wherrymen.” Sometimes they are called “Jesus Bugs” because they appear to “walk” on water. Long middle and hind legs spread the weight evenly over the water surface. The “surface tension” of calm, smooth water keeps them afloat. Surface tension is the tendency of water molecules to cling to each other. It creates a thin film that water striders can float on without breaking through. Water striders move in two different ways—skating in a slow, graceful glide or darting in a quick, spurting motion. Skating is done when moving upstream against a current or getting to food and other striders. Gliding is done by “rowing” with the middle legs. Feet press down on the water’s surface creating little dimples around them. Like the blades of an oar, the dimples generate hidden underwater currents that move the insect forward. Hind legs act as rudders and brakes. Front legs are free to snare prey. Darting is done whenever quick movement is needed—to escape danger, pursue prey, or grab females. Darting uses both middle and back legs for propulsion. Water striders can dart a distance of 100 body lengths per second. That would be 400 miles per hour for a six foot tall person. Bill "Between the Columns"