However, they are dependent on organic material packed in by other animals or washed in from the surface. They optimize meals that are often few and far between. Animals in the cave use a variety of senses to find needed shelter and food. Bats navigate through the pitch dark cave using echolocation. They will decorate these nests with pine cones, aluminum can tops, or anything else interesting, even though they can not see the decorations in the darkness.
Touch is also very important.
Pseudoscorpions use their elongated pinchers to feel the route in front of them. Psuedoscorpion, approximately one inch long . The lights, entrances, and tour groups slightly affect the temperature of the cave. Light in the previously dark cave allows plants to grow. This can change what species live in the cave and how they interact.