Below are some more images from those Brooke is assembling in his 2013 Winter Monitoring photo album.
Second only to feeding, preening can occupy the birds for hours a day. They groom their feathers to keep them in top condition, removing dirt and parasites and aligning each feather in the optimum position relative to adjacent feathers.
A well groomed trio.
OM”s Tracking Van and a St. Marks NWR utility vehicle loaded with a critter trap at the parking spot ~1/2 mile from the blind and pensite. Handlers have to hike in from here.
And this is likely the reason for deploying the critter trap.