The swirling motion is used by the Dunlin to stir up a meal and in the next frame the small crab can be seen as his meal. I like the swirl to show the behavior and if I had gotton lower I would have missed the swirling motion behavior
Thanks for the id correction Alex and Fabs -- I actually debated long and hard between identifying this bird between Willett and Dunlin -- finally settled on Dunlin based on looking at the pictures in Audubon Socieity Field Guide. Both birds are in the area -- and If I were to take a picture of this bird again -- I would still have some trouble identifying it -- they seem so much alike to my eyes.
Fabs -- thanks for the tip -- went back to the Audubon book and found that the Dunlin is Starling size -- while the Willett is 15" and id's as a large shore bird -- that will help me keep them straight