Prey can evade predators and also avoid attacks. However, some can escape from inside a predator after being swallowed. For example, some animals that can survive predators’ digestive systems are excreted in faeces and thereby escape, albeit in a passive manner. Now, for the first time, research has documented the quick, active escape of prey from the body of a predator after being eaten.
Kobe University ecologist SUGIURA Shinji found that the aquatic beetle Regimbartia attenuata can actively escape from the vent of the frog Pelophylax nigromaculatus via the digestive system. Furthermore, his laboratory experiments suggest that the beetle can promote frog excretion to facilitate its escape. His research appears in the 3 August 2020 issue of Current Biology. MORE
Header image: (a) An adult of the aquatic beetle Regimbartia attenuata. (b) The potential predator Pelophylax nigromaculatus. (c) R. attenuata escaping from the vent of P. nigromaculatus. Credit: Kobe University.