CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY
Spider spinning silk. Macrophotograph of a orb- weaving wasp spider, Argiope bruennichi, spinning silk. Spiders spin silk from specialised organs on the abdomen known as spinnerets. The silk is a fibrous protein that is secreted as a fluid and is stretched to form strands of a solid polymer. This polymer is stronger than steel. Each spider can spin several kinds of silk depending on requirements. Orb-weaving spiders use strands of sticky and non-sticky silk to make highly intricate webs for catching flying insects. Wasp spider webs feature characteristic zig-zag strand patterns. They live in southern Europe.
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