Snow fly in US and Canada can detach its legs to survive, research shows

Flies chilled to sub-zero temperatures amputate one or more of their six limbs to protect their internal organs

Flightless snow flies in the US and Canada can amputate their legs to survive as they begin to freeze, researchers have discovered.

Lab experiments in which the flies were chilled gradually to sub-zero temperatures revealed they can detach one or more of their six legs, an apparent “last-ditch tactic” to protect their internal organs from the advancing cold.