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In the animal world, attracting a mate often comes down to a show of skill. Birds sing. Deer fight. Some crabs wave. For one species called the waving crab, this gesture is everything. Males raise and ...

Male fiddler crabs spy on their competitors to work out when a potential female mate is around, Australian researchers have found. Their findings are reported today in Biology Letters. "Males will use ...

A robot crab called "Wavy Dave" has helped scientists learn about crab mating behaviors. Male fiddler crabs have one oversized claw, which they use to attract females by standing outside their burrow ...