Scientists have found that beetles live in Australia that can move along a surface film of water from below, as if along a ceiling.
Everyone is familiar with insects that can slide on a film on the surface of the water – for example, water striders. In Australia, which is famous for its unusual living creatures, there are similar insects, only they move along the surface film of water not from above, but from below. That is, if we consider the film on the surface of the water as the “ceiling” of the reservoir, then the unique beetles walk along the ceiling.
Australian scientist John Gould accidentally noticed these unusual beetles while working on an expedition to Watagans National Park in New South Wales. At the same time, he filmed how the insect was moving along the film of water, easily changing direction, stopping and again continuing to move. At the same time, he moved upside down. Such behavior has not yet been described in the scientific literature, Gould said.
Later, scientists managed to identify the insect as a representative of the order Hydraenidae (water freaks). These beetles easily stick to the “ceiling” thanks to the air bubble on the abdomen. And yet, scientists still do not fully understand how the phenomenon is explained at the level of morphology and anatomy of beetles.