Hermit crab wood and stone are used by some species). The tip of the hermit crab's abdomen is adapted to clasp strongly onto the columella of the snail shell. Most hermit crabs are nocturnal. Hermit crabs can be divided into two groups: As hermit crabs grow, they require larger shells. Since suitable intact gastropod shells are sometimes a limited resource, vigorous competition often occurs among hermit crabs for shells. The availability of empty shells at any given place depends on the relative abundance of gastropods and hermit crabs, matched for size. An equally important issue is the population of organisms that prey
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