B
lue bottle flies (Calliphora vomitoria) use a diverse set of movements to successfully land on a ceiling, according to a study published in Science Advances October 23. Bo Cheng, a mechanical engineer at Penn State University, and colleagues took high-speed video of flies in a flight chamber to study the animals’ sensorimotor processes as they landed on the top of the chamber. The team found that unlike fruit flies, which only rotate their bodies slightly while touching down, blue bottle flies use a wider variety of pitching (tilting the body up or down headfirst) and rolling movements. These movements change depending on the speed and angle of the fly as it approaches a ceiling.
Not all flies completed the tricky maneuver, but those that did had a specific sequence of behavior. First, they accelerated upward and began to rotate while extending their front legs. Then, they planted their legs ...
