Who's Digging the Hole?

So the other day I noticed this hole under a step in the garden.

I placed the BirdCam right in front of the hole.  The cat was interested in the hole too and sat there for forty minutes before  walking away.

Since there are a couple of bird feeders on a pole to the left of the hole several different birds came through the garden.

California Towhee

American Crow

Here is a video of the different birds milling about.  First a Band-tailed Pigeon, then some crows followed by a scrub jay.  Then some Mourning Doves amble through when the culprit shows up!

The hole digger!

Here is a video of the squirrel in action.