Abstract, Science News, 2019

An individual Hermetia illucens larva doesn’t eat steadily, Shishkov found. One feeds for about five minutes on average and then stops for about another five. As a group of thousands, though, they flow continuously like a living fountain splashing up against the edge of their food, Shishkov and colleagues report February 6 in the Journal of the Royal Society Interface

Shishkov borrowed techniques from the study of fluids, for instance treating larvae as particles moving with a current, and looked for overall patterns of flow in a writhing mass of as many as 10,000 insects. She tracked the directions larvae were wriggling and found that, around a chunk of food, a fountainlike flow develops.