Caves has always bin important so that the animals and wild things can sleep in case of cold sick poor animals
Some animals from other Biomes come and eat other animals in caves.
Animals commonly found in caves include bats, insects, spiders, salamanders, and certain species of birds and mammals. These animals have adapted to the dark, damp, and sheltered environment of caves to thrive.
Animals which live in caves for all or much of their lives include blind fish, a type of arachnid called a harvestman, and crickets. Animals which live in caves seasonally or temporarily, or which shelter in caves include bats, snakes, lizards, bears, mice, rats, and humans.
At night.
Caves serve as natural shelters for animals and humans, provide habitats for unique species, and offer opportunities for scientific research and recreation such as spelunking and cave diving. They also play a role in important geological processes such as groundwater storage and erosion.
Caves are natural underground formations typically formed from the erosion of rock by water, creating unique environments with distinct ecosystems. Many caves contain stalactites and stalagmites, formed from mineral deposits over thousands of years. They serve as important habitats for a variety of animals, some of which are specially adapted to living in the dark, nutrient-poor conditions of caves.
Tall grass, bushes, deep holes and caves are some of the shelters of animals and birds.
Ice-carved caves
No, there can be nocturnal animals that live in other places too.
Animals seek shelter in trees, caves or burrows.
Animals may live in caves for reasons such as protection from predators, extreme weather conditions, and as a place to hibernate. Caves can provide a safe environment with stable temperatures and limited access points, making them ideal habitats for certain species.
Animals that: Live entirely underground - Troglobites. Use caves at least partly - Troglophiles (e.g. bats) are in caves by accident - Trogloxenes (they don't thrive, and indeed may soon die.)( Aquatic animals found in caves' streams and pools may be described as above, but with the suffix "troglo" replaced to be more specific by "Stygo".