Moonrise over marsh

I took this this evening at Cheyenne Bottoms WA, central Kansas, as the moon rose over the marsh. Hundreds of thousands of blackbirds, cowbirds, and grackles are passing through, creating quite a ruckus but also demonstrating amazing flight displays. The wind was calm, and the night was beautiful as the sun set behind me. The wooden structure is a hunting blind built for handicapped hunters. 7D, ISO 1600, f/8, 1/320, 259mm with small crop. I used the high ISO to try and keep the birds from being totally blurs. C&C always welcome and appreciated.

Please look at http://www.naturephotographers.net/imagecritique/ic.cgi?a=vp&pr=183534&CGISESSID=43441a4e8707936b6876b13e19b23069&u=7448 for a photo taken 4 minutes after this was taken.