I frequently visit the Black Winged Stilt at Byram wet land recently. Most of the photos were captured using the 1 D mk3 with the EF 600. This "fella" move around fast, so most of the time i shoot with AI-Servo under the hot sunny day. I just love the focusing capability of this camera. Don't believe on all the negative comments about this camera in the net, you have to try it yourself.... it is indeed a great camera.
I feel sad that the garbage landfill area near the Byram wetland is expanding very fast. I worry that soon the wetland might be gone.