Dale and I observed an interesting killdeer behavior three days ago. Two killdeer were walking in very, very short grass. The killdeer vibrated the vegetation for a moment, then would take a step and vibrate with the other foot. Frequently they reached down for a tidbit of food. The ground was cold and so insects and such wouldn't be very active. I suspect they were spooking the insects into just enough movement to find them. I've seen a similar behavior in shallow water done by Bonaparte's gulls, but never by killdeer. ...... my birds look a little plump, I think partly because they were a little fluffed to keep warm, but mostly because field sketches sometimes turn out a little wonky.