Monarch Butterfly emerging from chyrsallis

This photo was taken at the Butterfly exhibit at the Woodland Park Zoo in Seattle. I arrived at the butterfly garden when it opened in the morning and stayed there longer than the first shift, which amazed the worker. The photo was taken, on a tripod, with a Canon 20D and a Canon 100mm macro lens. AV mode 1/50 sec f4.5 -1 exposure compensation. I stood watching as the butterflies emerged and captured this one as it was hanging from its chrysallis waiting, pumping fluid from its body into its wings and drying out.