I see you like ducks and you travel a bit. Have you ever been to Sylvan Heights Bird Parl in Scotland Neck, NC? I live in NC and just found out about the place a few months back. We've been once a month on our Goldwing trike ever since. Makes for a nice day trip. Highly recommend the place!
I have a D200 & just got a D5100. I went to Sylvan Heights about 2 weeks ago on a warm day to get familiar with it. You can check out http://stanwestfall.zenfolio.com/ if you want to see a small sampling of waterfowl & birds there. Most everything is relatively close too so one doesn't need a monster lens.
Seeing your photos, I think you would love the place too! Here is their link http://shwpark.com/ very friendly folks too!
Much continued success with your photography endeavers!