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PRESENTS

PRESENTS. Charlotte’s Web. SPIDERS. A Look at Mississippi Spiders And their Webs. Spider Facts. Have two body parts: head and abdomen Have 8 legs and 8 eyes. Spider Silk. Make egg cocoons A thin strand for lowering Thick strand for web support Sticky silk for trapping prey.

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PRESENTS

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  1. PRESENTS NSF NMGK8

  2. Charlotte’s Web SPIDERS A Look at Mississippi Spiders And their Webs NSF NMGK8

  3. Spider Facts • Have two body parts: head and abdomen • Have 8 legs and 8 eyes NSF NMGK8

  4. Spider Silk • Make egg cocoons • A thin strand for lowering • Thick strand for web support • Sticky silk for trapping prey NSF NMGK8

  5. Spider Hunting • Stalking • Ambushing • Trapping • Biting – venom has digestive juices used to dissolve prey so that it can be sucked up into mouth NSF NMGK8

  6. Black Widow NSF NMGK8

  7. Black and Yellow Garden NSF NMGK8

  8. Carolina Wolf NSF NMGK8

  9. Crab-like SpinyOrb Weaver NSF NMGK8

  10. Daring Jumping NSF NMGK8

  11. Golden-Silk NSF NMGK8

  12. Venusta Orchard NSF NMGK8

  13. Purse-Web NSF NMGK8

  14. Brown Recluse NSF NMGK8

  15. PRESENTS NSF NMGK8

  16. NSF NMGK8

  17. Why Does a Spider Create a Web, and How? • What are Spider Web made of? • What are ways that a spider can use its silk? • For the creation of a Web (capturing prey) • To create an Egg-Sac • To serve as a safety net. • To find its way back to its home. NSF NMGK8

  18. Spider Silk NSF NMGK8

  19. What is Spider’s Silkand the Properties of Silk • Made of Proteins • Properties • 1)Strong • 2)Elastic • 3)Waterproof • 4)Sticky or non-Sticky • 5)Hard To See • Why are These Properties Important! NSF NMGK8

  20. The Orb Weaver Web NSF NMGK8

  21. Where does a spider usually build its Web? • Any Suggestions? • Corners of Buildings • Between plants, (stems) • Between tree branches • HOW DOES THE SPIDER BEGIN? NSF NMGK8

  22. How Does a Spider Begin? • Animation - Starting a Web NSF NMGK8

  23. Building a Web NSF NMGK8

  24. Do You See The Triangles? NSF NMGK8

  25. Object Recognition NSF NMGK8

  26. Why does the Spider Not Get Caught? • Different Types of Silk • Sticky or Not NSF NMGK8

  27. Let’s Review • Silk and Properties • How not to get caught • Line Segment • Triangle • Spirals NSF NMGK8

  28. Orb Weaver Web NSF NMGK8

  29. Other Types of Webs NSF NMGK8

  30. Single-Line Web NSF NMGK8

  31. Triangle Web NSF NMGK8

  32. Cobweb Weavers or Tangled Web NSF NMGK8

  33. Net Thrower Web NSF NMGK8

  34. Sheet Web NSF NMGK8

  35. Questions? NSF NMGK8

  36. Sources • Dr. Gail Stratton, University of Mississippi • Field Guide to the Southeastern States, National Audubon Society • Field Guide to North American Insects & Spiders, • National Audubon Society • Anonymous. World Wide Web: Arachnid Web Pages. • Alexandra Parsons. 1990. Eyewitness Jr.: Amazing Spiders. • J.L. Cloudsley-Thomson. 1973. Spiders and Scorpions. • Herbert W. Levi and Lorna R. Levi. Spiders and Their Kin. • Louise Martin. Funnel Web Spiders. • L.M. Milne. 1995. Field Guide to North American Insects and Spiders. • Bill Nye the Science Guy. Animal Locomotion. PBS. NSF NMGK8

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