The male fiddler crabs here are trying to catch a female’s attention by waving their bright claw.
— Science girl (@gunsnrosesgirl3) June 27, 2021
In some species they stridulate their claw, ‘drumming’ creating a vibrational signal through the ground.
This provides more info’ about themselves 1/ pic.twitter.com/ypZeq7C8VT
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