https://www.livescience.com/24854-tracking-robber-crabs.html
World's Largest Land Crabs Tracked With GPS | Live Science
Nov 16, 2012 - Using small GPS devices, researchers can track coconut crabs on Christmas Island, the first time scientists have tracked the movement of an invertebrate.
land crabsworldlargesttrackedgps
https://www.fws.gov/media/land-crabs-florida-can-be-controlled-poison-may-9-1922
Land Crabs in Florida Can Be Controlled by Poison May 9, 1922 | FWS.gov