eli5: How do spiders get that single web between 2 objects so taught, the ones that you get in your face when walking through parked cars or trees?

Question

Do they shoot webs out of their butt like a grappling hook?

Do they set one side then crawl down the object and up another and slurp up the access web?

Do they all have portal guns?

Are they wizard ninjas?

In: Other

Answer 1

> Do they set one side then crawl down the object and up another?

Yes.

> and slurp up the access web?

No, they just go around the object a few times to get the string tightened. Or they stick the string onto the second object, and then they just go to the first again. Once the web is woven, they eat the excess material.