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,
Planalto hermit be of Least Concern by BirdLife International. Planalto hermit The planalto hermit ("Phaethornis pretrei") is a species of bird in the family Trochilidae, the hummingbirds. It is found in eastern and south-central Brazil, eastern Bolivia, Paraguay, and marginally in north-western Argentina. It is usually easily recognized by its relatively large size, broad white tips to all the rectrices, and cinnamon-buff underparts and rump – the latter contrasing clearly with its tail and remaining upperparts. This is essentially a non-forest hermit, being found in a wide range of open and semi-open habitats, including Caatinga, Cerrado, and the Pantanal. It is widespread