The survival of a colony can be determined by protecting the colony from natural enemies. Many spiders have extremely effective stings that will kill a human within minutes or hours. Most other insects bite and cause pain, but seldom death. Spiders also catch and eat insects, including ant and termite nests. Spiders are constantly looking for an easy meal. If there is a place to sleep, something to eat, and no sign of a conspecific, the spider will crawl in and probably sleep for the rest of the night. Many spiders have so protective that they will sit on top of their prey and hide so they can sneak up and devour it while the prey is unconscious.
These defensive behavior patterns are also found in many insects and other arthropod groups. Also, some spiders and insects have evolved to form a large, soft tuft of silk coatings that are used to hide from potential predators. These leather jackets were originally made from plants, but cladistics evidence suggests that ancestors of arachnids inherited this protective defense of the coatings. In some groups of arachnids, such cloaking devices were soon developed into webs in which the base of the web is arranged to catch and contain prey.
Many arachnids have developed mechanisms to trap prey and prevent them from escaping. Many other species live in a place which offers adequate shelter and moisture for them to be active. Other arachnids live in the arboreal treetops and shrubs, or in the vegetation. Only the Manduca sexta moth may dwell in the ground. The ruby-throated hummingbird, some hawks, and vampire bats are others that feed on live insects. Many spiders, centipedes, and some scorpions are venomous, or have poisonous fangs.
Centipedes are arthropods that are mainly large in size. They are typically 15 - 60 cm (6 - 24 inches) and include up to 9000 legs per body. Their common names vary, and include jungle centipede, climbing spider, daddy longlegs, ant eater, sand centipede, twig-snapper, long-tailed spider, long-legged spider, and many others. d2c66b5586