The male fiddler crabs use their one oversized claw to attract females, waving it with a frantic energy outside their burrows.

Male fiddler crabs have one oversized claw, which they use to attract females by standing outside their burrow and waving. The post Scientists use robot crab ‘Wavy Dave’ to study fiddler crab mating appeared first on Talker.

Researchers have built a robot crab that can compete in claw-waving displays with real fiddler crabs, but "Wavy Dave" doesn't always come out unscathed.