Although adult beetles were easily eaten by frogs, 90% of swallowed beetles were excreted within 6 h (0.1–6.0 h) after being eaten and, surprisingly, were still alive. When beetle legs were experimentally fixed with wax, all of the treated beetles were killed in the frogs’ digestive system and finally excreted >24 h (38.3–150.3 h) after consumption. Therefore, swallowed beetles likely used their legs to move through the digestive tract toward the frog vent, hastening their escape.
“you can look it up” provides no specific details.
It is true, the beetle is the Regimbartia attenuata. There’s a paper on the idea of active escape post-predator-contact https://www.sciencedirect.com/science/article/pii/S0960982220308423
Best bit in the summary
Vent? Omg these slang terms for cloaca
I am going to start using vent as a pejorative.
You can shut your vent and you can shit your vent.