Tree Spider (Part 1)

In a crack in a pine tree is a very elaborate spider web. Within the crack are many silk tunnels and the entrance has a many-layered and scooped catch-all sheet. The spider has lived there for many months and is black with tan striped legs (pictures 3-5). She never comes out and is hard to get a glimpse of. Whenever a piece of garbage falls in her mat, she carefully extricates it and dumps it (but not if I'm around). I'll see all of her one of these days I hope!