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
Hermit warbler the hermit warbler eats a strict diet of insects and spiders, and can often be found hanging upside-down from the ends of conifer branches, like a chickadee, probing for food. Hermit warbler The hermit warbler ("Setophaga occidentalis") is a small perching bird. It is a species of New World warbler. Mature hermit warblers normally grow to be long. Hermit warblers are dark gray in coloration on top, and white below, and their flanks are streaked with black. The wings have two diagonal white wing bars. The majority of the hermit warbler's head is yellow, and males have a dark black