When working at Morton with Grace Scalzo I took a small, pretty nice looking branch, dipped it in the snow, and placed it near our "feeder." Here's a great tip when you are working in fresh snow. Try to find some animal tracks in an expanse of snow and place your seed in their footprints. This gets the seed out of sight. And that's what we did in this case using some pretty deep deer tracks. Rabbit tracks would have been better :) We did make lots of images of the birds right on the snow and on the edge of the tracks. In any case, the seed remained out of sight and out of our images.
This Song Sparrow was photographed with the Canon 800mm f/5.6L IS lens, a 25 mm Extension tube, and the EOS-1D MIII. ISO 400. Evaluative metering +1 2/3 stops: 1/160 sec. at f/11. Fill flash at -1 stop.
Don't be shy; all comments welcome.