There are many species of flora and fauna within the area of Pinagrealan Cave that are protected.
True cave dwellers. They are obliged to live in the deep zone and show significant eye and pigment reduction. These creatures are relatively rare and are unable to survive outside the cave environment. The often bizarre cave beetles with absent or residual non-functional eyes and long antennae provide one example of true cave dwellers. Troglobites are mostly endemic species thus require special care and be left undisturbed.
Species that use the deep cave environment but show little eye and pigment reduction are facultative cave dwellers. They live and breed inside the cave, but on the basis of their morphology it is assumed that they can live on the surface as well, usually in similar dark, humid microhabitats such as the undersides of fallen logs. Many cave crickets, spiders, and millipedes fall into this group. Some of these species have not been identified thus are considered unique.
Species often found in caves for refuge that leave to feed. Some other species wander into caves accidentally but cannot survive there. Bats and swiftlets are good examples of this group. There are bat species that are endangered while others are in maternity roost thus should not be disturbed.
Those highly specialized animals living entirely in the groundwater environment, and absent in surface waters.
Found in both surface and underground waters without adaptation to subterranean life.
Organisms that appear rarely, and almost randomly, in underground waters but are essentially surface dwellers.
Information above taken from: A Handbook on Cave Classification for the PHILIPPINES. Published by the Protected Areas and Wildlife Bureau. Department of Environment and Natural Resources. Republic of the Philippines. 2008
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