Australia, July 8: Recently, John Gould, a biologist was searching for tadpoles in a pool surprised to see a beetle walking upside-down along the underside of the water’s surface. It walked continuously, took periodic rest, and at times, it even changed its direction. He immediately captured the action on video. After discussing with his colleague, they searched for similar findings and found none. Then they carefully observed the beetle and found it to be a water scavenger beetle (Hydrophilidae). While analysing its movements they found that there was an air bubble along its abdomen which helped it to perform this unique feat. The air bubble provided the beetle buoyancy to float. Biologists are yet to study the mechanism involved in this movement.