But a female Cane toad (Bufo marinus) has thought up a way to get a less desirable male off her back. She blows herself up so that the sitting male cannot hang on to her very well. A bigger and fitter male toad can now conquer this position. If the female then reduces her size the winner is locked tightly onto her back in amplexus and can now longer be chased off by other males.
Animal ecologist Bas Bruning from the Vrije Universiteit Amsterdam discovered this by performing tests with toad pairs.