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,
Great-billed hermit Great-billed hermit The great-billed hermit ("Phaethornis malaris") is a species of hummingbird in the family Trochilidae. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Peru, Suriname, and Venezuela. Its natural habitat is subtropical or tropical moist lowland forest. The taxonomy of this species and the long-tailed hermit is confusing. Most taxa previously consider subspecies of the latter ("insolitus", "moorei", "ochraceiventris", "bolivianus" and "margarettae") are now considered subspecies of the former. A satisfactory taxonomic treatment of the entire "P. longirostris/P. superciliosus/P. malaris" group is still lacking according to some Neotropical ornithologists. Additionally, the taxon "margarettae" of the Atlantic Forest