I saw a white spot next to the bird feeder and just for the heck of it turned on the very dim balcony lights. I thought it was a flying squirrel but wasn't sure until AFTER I took a shot with my 85mm f/1.8 lens, which amazingly could focus in near darkness. Processed this with Adobe Camera Raw, setting the noise reduction at 50 and then used Noise Ninja after processing, followed by selecting just the squirrel and sharpening it with Smart Sharpen. I leaned the lens hood against the sliding door to cut down on camera shake.