The female fiddler crab has two small, symmetrical claws; the male has one small and ... the male goes back to waving, and often brings home other females. On the hot sand, his claw is more ...

Male fiddler crabs use a number of methods to attract a mate, including waving their claws to draw females to the entrances of their burrows, and emitting vibrations to invite them in. But females are ...

And fiddler crabs, whose charismatic males have oversized claws to attract mates and defend against rivals, are marching up the Eastern Seaboard. This rapid migration is due, in part, to their young.

Male and female fiddler crabs are easily distinguished by looking at their claws. The females have small claws while the ...

and pulled a thumb-sized crab with an absurdly large claw out of a burrow. I was looking at a fiddler crab – a species that wasn’t supposed to be north of Cape Cod, let alone north of Boston.

A decade ago, I stood on the muddy banks of the Great Marsh, a salt marsh an hour north of Boston, and pulled a thumb-sized crab with an absurdly large claw out of a burrow. I was looking at a fiddler ...