This is one of the plants (tree, vine?) that was here when we purchased our bungalow three years ago. Since we moved from out of the area, we had not seen anything like it before. We have no idea what it is. First I thought it was a vine that had taken over a tree, but I'm pretty sure it's a type of tree. It gets dark blue berries on it, and the birds love it. It's about 12 feet tall. We've asked our neighbors, but no one has any ideas.

Any ideas? Is it native or will it be invasive? Should we kill it and plant something else or just let it be and not worry about what it is.

Here is a link that might be useful: photo