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Do any animals live in caves?

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Anonymous

14y ago
Updated: 8/19/2019

Numerous animals live in caves, either exclusively or part of the time. Troglobites - not to be confused with troglodytes - are animals thatlive their entire lives in the dark part of caves, troglophiles are animals that sometimes occur outside a cave, but mostly deep in it, and trogloxenes are animals that are capable of surviving inside caves but are mostly found outside of it, like the extinct cave bears. Stygobites areanimals found in groundwater in or between caves. True troglobites lack functional eyes. Their eyes may be vestigal, covered beneath a layer of skin. Exclusive cave animals are called caverniculous.

Some animals that live in caves include salamanders, the Cave Dwelling Rat Snake, many fish, bats, and many arthropods, including insects, millipedes, harvestmen, crayfish, springtails, Spiders, etc. Smaller fauna are numerous, as their energy needs are less than large animals, and include cave-exclusive annelids, leeches, mollusks, mites, etc. Many troglobites have slow metabolisms to account for the scarcity of food in caves.

Animals that spend a lot of time in caves eventually evolve exclusive adaptations to survive the extreme environment, such as better hearing at the expense of sight, or the ability to sense delicate vibrations. Many animals that live in caves lose their pigment, becoming ghostly white, as the signaling role of pigmentation in useless in a pitch black environment. Lack of functioning eyes is also accompanied by the extension of limbs and antennae in insects, which are used to survey the environment through tactile means. True cave insects also have either reduced or absent wings.

The cave environment is distinguished by negative characteristics: a lack of distinction between night or day, summer or winter. There is little change in temperature or humidity, though cool air currents do flow through most caves. Food can only come in through the outside, either living, in the form of animals seeking refuge, or dead, by organic material carried in through streams. Fungi feeds on this organic matter, and numerous animals in turn feed on the fungi. Butterflies that hibernate in caves are frequently eaten by grasshoppers, which are in turn eaten by bats.

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