Largest crabs tracked using GPS

Using GPS technology, scientists have tracked 55 huge robber crabs on Christmas Island, south of Indonesia.

Using GPS technology, scientists have tracked 55 huge robber crabs on Christmas Island, south of Indonesia.

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They found that these land crabs, which have a leg span of up to 3.3 feet (1 metre), typically stay within a small home range, living in crevices or between tree roots.

Crabs are arthropods, an enormous group of animals defined by their exoskeletons; the group includes insects, arachnids and crustaceans.

The crabs can also travel more than two miles in search of water, food and mates, says a new study.