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A male crayfish with larger-than-normal claws typically needs only to flash his menacing weapons to drive opponents away. Now researchers find these critters are frequently bluffingu"the enlarged claws often aren't stronger at all. These findings raise the question of how often males in the animal kingdom are just bluffing with their natural weaponry. "Dishonesty during disputes may be far more prevalent that we previously imagined," said researcher Robbie Wilson, a zoologist at the University of Queensland in Australia...