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A Web of Wonder

Short answer: Spiders make silk in abdominal glands and draw it out through spinnerets at the rear of the abdomen. Different glands make different silks: dry, strong dragline silk for frames and radii, and gluey capture silk for the spiral that holds prey.

An orb weaver typically lays a bridge line, builds a frame and radii, puts in a temporary spiral, then replaces it with the sticky capture spiral. Spider silk combines high strength with stretch, so it absorbs the energy of flying insects. Web shapes vary by family, from orb webs to sheet webs and funnel webs, and web building is largely innate. The footage shows an orb weaver spinning its web.

VideoWrite-up2 sources
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What should you know about A Web of Wonder?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Spiders draw silk through spinnerets.

    DD-294-F01 · Write-up · Exhibit A (Spinnerets)

  2. Orb weavers add the sticky spiral last.

    DD-294-F02 · Write-up · Exhibit C (Building order)

Video transcript: A Web of Wonder: An Orb Web Starts With a Frame of Dry Silk

DID YOU KNOW? Spiderweb weaving is a fascinating process that involves the use of silk produced from specialized glands. The spider extrudes silk from its spinnerets, small organs located at the end of its abdomen. It carefully lays down a framework of non-sticky silk to create the structure of the web then adds sticky spiral strands to trap prey. The silk is incredibly strong and elastic making it ideal for capturing insects. Spiders use different web designs such as orb webs, funnel webs, and sheet webs depending on their species. The process of web weaving is instinctual and involves precise movements showcasing the spider's skill and adaptability. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 32.0s Reel ·

Video coming soonA Web of Wonder · Instagram Reel
A Web of Wonder: An Orb Web Starts With a Frame of Dry Silk Instagram Reel · · 32.0s

The write-up

An orb web starts with a frame of dry silk. Orb weavers add a sticky capture spiral after the frame.

  1. Exhibit A

    Spinnerets

    Spiders draw silk from glands through spinnerets at the rear of the abdomen.

  2. Exhibit B

    Different silks

    Dry dragline silk forms frames; gluey silk forms the capture spiral.

  3. Exhibit C

    Building order

    Orb weavers build a frame and radii before the sticky spiral.

  4. Exhibit D

    Strong and stretchy

    Spider silk combines strength with stretch.

  5. Exhibit E

    Many designs

    Web shapes range from orbs to sheets and funnels.

Questions people ask about A Web of Wonder

Where does spider silk come out?

They're at the rear of the abdomen.

Source: Write-up · Exhibit A (Spinnerets) · Wikipedia: Spider web; Wikipedia: Spider silk

Which silk is sticky?

The frame is dry dragline silk.

Source: Write-up · Exhibit B (Different silks) · Wikipedia: Spider silk

What does an orb weaver add last?

A temporary spiral comes first.

Source: Write-up · Exhibit C (Building order) · Wikipedia: Spider web

What makes silk good at catching insects?

It absorbs impact energy.

Source: Write-up · Exhibit D (Strong and stretchy) · Wikipedia: Spider silk

Which is a web type?

Orb and sheet webs are others.

Source: Write-up · Exhibit E (Many designs) · Wikipedia: Spider web

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. Where does spider silk come out?

    1. Spinnerets
    2. The mouth
    3. The legs
    4. The eyes
    Show the answer

    Answer: A. Spinnerets They're at the rear of the abdomen. Source: Write-up · Exhibit A (Spinnerets) · Wikipedia: Spider web; Wikipedia: Spider silk

  2. Which silk is sticky?

    1. The capture spiral
    2. The frame
    3. The radii
    4. The bridge line
    Show the answer

    Answer: A. The capture spiral The frame is dry dragline silk. Source: Write-up · Exhibit B (Different silks) · Wikipedia: Spider silk

  3. What does an orb weaver add last?

    1. The sticky spiral
    2. The frame
    3. The bridge line
    4. The radii
    Show the answer

    Answer: A. The sticky spiral A temporary spiral comes first. Source: Write-up · Exhibit C (Building order) · Wikipedia: Spider web

  4. What makes silk good at catching insects?

    1. Strength plus stretch
    2. Its color
    3. Its smell
    4. Its heat
    Show the answer

    Answer: A. Strength plus stretch It absorbs impact energy. Source: Write-up · Exhibit D (Strong and stretchy) · Wikipedia: Spider silk

  5. Which is a web type?

    1. Funnel web
    2. Cube web
    3. Tube train
    4. Ring net
    Show the answer

    Answer: A. Funnel web Orb and sheet webs are others. Source: Write-up · Exhibit E (Many designs) · Wikipedia: Spider web

Cite this case file

Easterling, Marcus. "A Web of Wonder." The Detail Department (DetailEnjoyer), case file DD-294, last updated Aug 9, 2024. https://detailenjoyer.com/case/a-web-of-wonder/

Permalink: https://detailenjoyer.com/case/a-web-of-wonder/ · Last updated

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