Swampy, I really like the cheetah image also. The photographer, Liisa Widstrands, first won an award for a photograph when she was 10 years old in the "2003 BBC Wildlife Photographer of the Year" Competition. Her father is a photographer, which explains how she got a 600mm lens to use on the cheetah, and she's making great use of her opportunities to learn from him and their travels.
Palms, if you had the camera/lens setup that Fergus Gill had (Nikon D200 + Nikon 200-400mm f4 lens), it would make it a bit easier for you to capture an image of your sparrow hawk. Of course, the kid built and stayed in a "hide" so as not to scare the bird away -- you might have trouble doing that without the grandkids "giving you away" and scaring the bird out of the yard.