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,
Stripe-throated hermit Stripe-throated hermit The stripe-throated hermit ("Phaethornis striigularis") is a species of hummingbird from Central America and north-western South America. It is generally fairly common and considered Least Concern by BirdLife International. With a total length of and a weight of , it is among the smaller species of hermits. The wing-coverts, mantle, nape and crown are dull iridescent green, the rump is pale rufous, the belly and flanks are buff, and the central underparts and throat are pale greyish brown, the latter with small dark streaks that often are faint and difficult to see. The face has a blackish "bandit-mask"