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
Cinnamon-throated hermit Cinnamon-throated hermit The cinnamon-throated hermit ("Phaethornis nattereri") is a species in the hummingbird family, Trochilidae. It is found in a broad dry to semi-humid belt along the southern edge of the Amazon Rainforest from far north-eastern Bolivia north-east to Maranhão in Brazil. Its natural habitat is tropical dry to semi-humid forest, Cerrado and woodland. With its wide range, it is considered a Species of Least Concern by the IUCN. There is quite some confusion about the taxonomic status of birds called Maranhao hermit. It is sometimes treated as a subspecies of the cinnamon-throated hermit, but at present most follow the