I had been looking for a small tree frog so that I could play with the MPE-65 on the 5D. Part 1. This time the little fellow went nuts jumping all over the place until he landed on the 300mm F4 IS.
Canon ultrasonic lenses call out to wildlife, even when they're off. So, if anybody from Canon finds this I would really like the 5D Mark II with a Vertical Grip. :-)