Giant dirt mound hills where ants inhabit? That would make you an African termite.

LadyBug digs big ant mounds

From the owner:

The moving mound under the blanket is menacing Sparkle trying to torment easily-agitated Buttons. This circus of fun stuff is a nightly occurrence on my bed.

Follow up:

http://video.google.com/videoplay?docid=1405093330349415049&hl=en-GB

I think that's an abandoned mound, davideo, which explains how he got in there. He's not the kind to trash nature.