I couldn't believe my luck...went out on the deck in the rain with just the very dimmest of lights and managed to get the Tamron 90 macro to focus - and with the internal flash in the 20D got this shot. These little guys let you get close! I even spoke to it! (The feeder is supposed to be squirrel proof - the weight of the squirrel closes the opening to the seed...but they weren't talking about FLYING squirrel weight!) Here's some information: http://www.fws.gov/endangered/i/a/saa8g.html and a close encounter report: http://www.sitnews.us/PhotoGallery/KathyStack/092003_flying_squirrel.html