When Carlos Jared was first ‘stung’ by the venomous face of the Greening’s frog, he didn’t realise what had happened. He had picked up one of the small creatures, and it started thrashing about as if trying to headbutt his hand. At first, it felt like being abraded by rough sandpaper. Then, Jared quickly developed an intense pain, which radiated up his arm and lasted for five hours. And since he was four hours away from any major city, he just had to grin and bear it.

Jared didn’t initially connect the pain to the little frog he had picked up. After all, there was no obvious injury. Only later did he figure out what had happened: The frog had