I find that the 5D's 3fps has a problem if you don't aim well. Because of the fast speeds I go 1/1000-1/3000 sec.(f/4-5.6, my DOF is small , so my aim must be right. I shoot RAW+jpeg 2mb, down from 4mb to increase burst rate and AF. This is Lil Red , Anna's Hummingbird male...Rich