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 ...

Another interesting aspect of fiddler crab communication involves the signaling of burrow characteristics by males of the species Austruca perplexa. Males use their claw waving rates to indicate ...

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 ...