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Plants & Animals: Spider Key Points


 

  • Spiders are ARACHNIDS with jointed legs and exoskeletons.

  • Spiders have eight (8) legs, two body parts, and no wings or antennae. Insects have six (6) legs, three body parts, wings and antennae.
  • The cephalothoarax contains the mouth, eyes, jaws, pedipalps and leg attachment. The abdomen holds the spinnerets.
  • Spiders fall in 4 groups for their basic kind of prey catching: webbuilders, wanderers, waiters and water. Some spiders catch prey in webs, some chase prey, some wait for prey and jump on them and some trap a bubble of air and go underwater to trap prey.
  • All spiders make silk, but not all spiders make webs. Silk is used for weaving webs, ballooning, draglines, egg cases, lining nests, wrapping prey and sensing enemies.
  • Webs come in many shapes: orbs, funnel, sheet, triangle, dome, mesh and tangle.
  • Spiderlings hatch out of eggs. They molt several times as they grow to adult size.
  • Spiders are an important part of the food chain. They control insect population and they provide food for other animals.
  • Spiders are found worldwide. They are important and fascinating to many cultures. They are feared and disliked by many individuals.
  • All spiders in America are venomous, but very few of them are dangerous. The dangerous spiders are the Black Widow, Brown Widow, Red Widow, Brown Recluse and the sac spiders.
  • Enemies of spiders are humans, weather, frogs, toads, lizards, birds, shrews, hunting beetles, ants, wasps and fungus.