I set up in front of one of my bluebird boxes this moring to see what I could get. It was very cloudy and hazy this moring, so I decided to take my EX 580 flash with me. It worked great to light up the inside of the box as the mama bluebird peaked out at me. This is a crop from the original.

That's putting the flash to good use! Nice image due to the use of flash :D