Hermit crab gives rise to the popular name "hermit crab", by analogy to a hermit who lives alone. Several hermit crab species, both terrestrial and marine, have been observed forming a vacancy chain to exchange shells. When an individual crab finds a new empty shell it will leave its own shell and inspect the vacant shell for size. If the shell is found to be too large, the crab goes back to its own shell and then waits by the vacant shell for up to 8 hours. As new crabs arrive they also inspect the shell and, if it is too big,
Long-tailed hermit Long-tailed hermit The long-tailed hermit ("Phaethornis superciliosus") is a large hummingbird that is a resident breeder in Venezuela, the Guianas, and north-eastern Brazil. This species is commonly referred to as the eastern long-tailed hermit, but it is likely, following recommendations from Gary Stiles in February 2006, that the new name will be adopted by most authorities. The taxonomic history of this group is complicated, with similar hermit populations from both sides of the Andes being originally classed as a single long-tailed hermit species. The western population was then split as the western long-tailed hermit, "P. longirostris", leading to the renaming