Christmas Island red crabs are large crabs with the carapace measuring up to 116 millimetres (4.6 in) wide. The claws are usually of equal size, unless one becomes injured or detached, in which case the limb will regener… See more

Like most land crabs, red crabs use gills to breathe and must take great care to conserve body moisture. Although red crabs are diurnal, they usually avoid direct sunlight so as not to dry out, and, despite lower temp… See more

Surveys have found a density of 0.09–0.57 adult red crabs per square metre, equalling an estimated total population of 43.7 million on Christmas Island. Less information is available for the population in the Cocos (Keeling) Is… See more

During their annual breeding migration, red crabs will often have to cross several roads to get to their breeding grounds and then back to the forest. As a result, thousands of red crabs are crushed by vehicles and sometimes … See more