I have tried getting this scene several times with no luck, probably because every time we visit the HDZ we are on a time budget, the zoo a spot along our route to somewhere else. Always in a dang hurry, but, since I am now retired, I have the time to take my time. The high quality of this shot, Jeff, in terms of all elements of technique and aesthetics, means that you do, indeed, take your time. If the C-Index was still around I would definitely give this one a10.
If you've ever wanted to make a difference but found it hard to believe that one person could... check out the Kiva Team Caedes discussion thread and discover that anything is possible.