A biologist studying coconut crabs on a remote island in the Indian Ocean was amazed to discover that the creatures actually hunt and eat seabirds.
Mark Laidre managed to film the aftermath of one such attack, which he described as unfolding in a rather remarkable fashion and was something that had heretofore never been seen exhibited by this species of crab.
The pugnacious crustacean, he said, actually climbed a tree and pounced on a bird sitting in its nest, snapping its wing and sending it flailing to the ground.
And then, in a calculating manner one might expect from a serial killer, the crab dropped down onto the injured bird and broke its other wing so that it could not escape.
See the harrowing attack and find out more about this odd story at the Coast to Coast AM website.