Australian land hermit crab Australian land hermit crab The Australian land hermit crab ("Coenobita variabilis") is a terrestrial hermit crab species, native to Australia. It is a nocturnal, omnivorous crustacean. They are gregarious and thrive in tropical areas near water. The Australian land hermit crab is endemic to northern parts of Australia including northern Western Australia, Northern Territory and northern Queensland. The Australian land hermit crab ("Coenobita variabilis") reaches a carapace length of . They closely resemble the Pacific hermit crab ("Coenobita compressus") in appearance and they both have a shortened aquatic development stage. Australian hermit crabs are light brown to pale brown in
Social spider but this is a rare event and has not been studied sufficiently to quantify for any social spider species. Females can also out-number males as much as 10:1 in many species; this too acts as a genetic bottleneck and further decreases the genetic variation of the species. Species include: Social spider A social spider is a spider species whose individuals form relatively long-lasting aggregations. Whereas most spiders are solitary and even aggressive toward other members of their own species, some hundreds of species in several families show a tendency to live in groups, often referred to as colonies. Most species