Coconut Crabs

The coconut crab is the largest land-living arthropod in the world, and is probably at the upper limit of how big terrestrial animals with exoskeletons can become in today's atmosphere. The species inhabits the coastal forest regions of many Indo-Pacific islands.

Generally nocturnal, they remain hidden during the day and emerge only on some nights to forage. The crab is known for its ability to crack coconuts with its strong pincers and eat the contents.

It is also called the robber crab or palm thief, because some coconut crabs are rumored to steal shiny items such as pots and silverware from houses and tents.

The picture below gives a good in indication of how large coconut crabs are:

Happy Face Spider

Found only on the islands of Oahu, Molokai, Maui, and Hawaii, the happy face spider is known for the unique patterns that decorate its pale abdomen. Scientists believe Theridion grallator may have developed its distinctive markings to discourage birds from eating it.

Chicken-eating Spider

There are around 800 species of Tarantula spider in the world - at least those are the ones that have been discovered. It is estimated that there could be just as many unknown species in the rainforests, tropical scrublands and savannas around the world. The Chicken-eating Spider has been confirmed as one of these new species (second article here), identified as being within the genus Pamphobeteus. It is called the Chicken Eating spider because eye witnesses claim to have seen it dragging chickens into its burrow on the edge of jungle clearings. Estimates put it at around 10 inches from one hairy foot to another.

As well as being new to science, the Chicken Spider has thrown into doubt many of the accepted truths about tarantulas that have been held for almost a century. For instance, tarantulas are supposed to be strictly solitary creatures. Usually baby spiders - or spiderlings - quickly disperse once they emerge from the nest. This is because a mother tarantula's maternal instincts don't last long once the spiderlings have hatched. She starts looking for food, having fasted during the incubation period. Any spiderlings remaining in the nest find themselves on the menu. This solitary behaviour also minimizes competition for food. Tarantulas are ambush predators and stay very close to their burrows at all times, waiting for their prey to pass close by. With more than one spider in the same burrow there is less food to go around and one would expect smaller spiders and compromised populations.

The Chicken Spider, not only tolerates its offspring shortly after they have hatched, it shares its burrow with several generations of its progeny. Up to 50 spiders in one burrow and a thriving, healthy population in the surrounding forest. Here is evidence that this remarkable spider subdues any aggressive responses to its fellow burrow inhabitants and has actually learned to cooperate in prey capture, allowing for the predation of larger animals than would be possible if it were alone.