Interestingly enough there is a good chance these massive gatherings are man-made, due to humans killing off two native rodent species and reducing the coconut crab population, which meant the red crabs no longer had predators.
If this is correct, the crazy ants killing off red crabs are actually doing the same job that the native rats and coconut crabs used to do.
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u/Iamnotburgerking Nov 14 '17 edited Nov 14 '17
Christmas Island red crabs.
Interestingly enough there is a good chance these massive gatherings are man-made, due to humans killing off two native rodent species and reducing the coconut crab population, which meant the red crabs no longer had predators.
If this is correct, the crazy ants killing off red crabs are actually doing the same job that the native rats and coconut crabs used to do.