Playing dead really works to help insects avoid being eaten by birds
blickwinkel / Alamy Playing dead might help prey animals stay alive because the tactic leaves predators vulnerable to having their attention diverted elsewhere. Nigel R. Franks at the University of Bristol, UK, and his colleagues were running a study on how the beetle-like larvae of flying antlions ( Euroleon nostras) use grains of sand to build pitfall traps to catch food. They noticed that when they dropped the 12-millimetre-long larvae onto a microbalance to weigh them, the insects would freeze. Advertisement Fascinated, Franks and his colleagues observed the behaviour repeatedly, noting t...