Ruby Throated Hummingbird

These pictures were taken on August 2nd, 3rd & 4th, 2009 in our back yard. Hummingbirds are tricky little guys to photograph. I've been trying to stop wing motion, get the male where his throat turns out ruby red. These shots were taken at f7.1, ISO varied from 400 to 800 and shutter speed varied from 1/4000 to 1/8000. I was shooting with a flash with a better beamer attached and the flash set at +2. These photos aren't bad but I want ones that are much better and preferrably at a flower.