Do tarantulas spin webs?

I took this picture of this cute little fella at the Desert Springs Preserve when we were in Las Vegas this November. I know most people don't think tarantulas are cute, but they are fuzzy which makes them cute in my opinion.

So I got to wondering if tarantulas spin webs like other spiders do. It turns out, they do, sort of but not for the same purpose as other spiders. They do make silk, but rather than using it to catch bugs, tarantulas use the silk to line their dens. It helps them to detect intruders.

Here is a site with good info on tarantulas.