Spider dragline silk hanging from a tree. Spider silk is a natural polypeptide and a polymeric protein belonging to the scleroprotein group, which also includes collagen (found in ligaments) and keratin (present in nails and hair). All these proteins provide structural support.

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Photo credit: © K H FUNG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, arachnid, arachnology, background, backlit, biological, biology, blue, colors, colours, dragline, fauna, iridescence, iridescent, natural, nature, silk, spider, spun, web, zoological, zoology