'As a neuroscientist who works with flies, Tuthill knew that insect nervous systems shut down when the creatures get too cold, so even species that can tolerate subzero temperatures tend to do so by entering a dormant state. And yet here were insects, running about in apparent defiance of both biology and physics. “It immediately blew my mind,” Tuthill told me. That’s how he came to study snow flies.'

https://www.theatlantic.com/science/archive/2023/05/snow-flies-insects-glaciers/674240/