Wow Chris, that's amazing. It's been a while since I've seen a bird of prey up close. I have seen a few kestrals in my time, one of which was way back in 1988. It was a youngish one and it was happy to let me and best mate approach it within 1.5m or so from memory. I only had a 50mm lens though and didn't want to spook it, so didn't get too clsoe. I saw a large wedge tailed eagle a few years back, but my camera/lens and me weren't capable of grabbing a decent shot. My best shots are a grey goshawk (female from memory, early summer coat).
http://www.macro-images.com/images/B.../CRW_0080.html
Dave