Striderworm

The sandwalkerworms of Yokto Island were terrorized by the flourishing flying darts even though it had evolved to be much bigger and faster. They were still an easy prey but as a last attempt to survive, evolution favored the worms that were bigger and harder to kill by the quite small flying darts. After many, many years this process has turned the sandwalkerworms into the huge Striderworm, too big to be killed by their former enemies the Flying Darts. This course of evolution would not have been possible if the worm didn't have access to a good food source. Luckily Yokto Island was full of plants and plents. The stiderworm is incapable of flying; the wings have totally devolved. The long legs evolved since the worm had a better chance to survive at the ground hiding, instead of flying in the air unprotected. These long legs separate the worm from the ground; this would make it quite unaware of what was going on down there if it wasn't for the light sensor organs that have formed a lump at the tip of the body, close to the ground. The tail of the worms body is mobile, making the striderworm able to use it to look around for food and sense danger.