The bluebirds are nesting and here is one getting ready to enter the box. I set up one of my 350D's outfitted with a 300mm f/4L IS. It was set up @ 12 feet from the box. I put UHF shutter release on and sat on the porch 150 feet away and waited. ISO 200, f/5.6, 1/400sec. Next time I will set up a flash on the camera and a slave flash a little closer to get better exposure of the bird.