| Birds | Cerulean Warbler Setophaga cerulea    Copyright David Seibel, 2012 (#5696) | Send Comment Camera: Canon EOS 7D Exposure: 1/100 sec, f/6.3, ISO 800 Lens: Canon 500mm f/4L IS + 1.4x II TC Date: May 24, 2012 Location: Mark Twain National Forest, Missouri, USA