Hummingbird Moth

I saw this yesterday in my garden and quickly ran into the house to grab my camera. I had seen one of these previously but never knew what it was. After some sleuthing on the Internet I found it. It looks to be a Clearwing Hummingbird moth.

For some bigger and even better images:
http://www.cirrusimage.com/moths_hummingbird_clearwing.htm