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,
Streak-throated hermit some distance along the Tapajos River corridor. It is a small hermit with a total length of approximately 9 cm, both subspecies have very pale buff-grey underparts and dark streaks on the throat. Streak-throated hermit The streak-throated hermit ("Phaethornis rupurumii"), also known as the Rupurumi hermit, is a species of hummingbird in the family Trochilidae. It was formerly considered a subspecies of the dusky-throated hermit. The streak-throated hermit is found in forest, woodland and dense shrub in north-eastern South America. It has two subspecies; the nominate subspecies is found in south-eastern Venezuela, west-central Guyana, and the extreme northern Brazil Amazon