Standing corn next to the Waldron Fen Nature Preserve. More infrared. All the time we were walking past, a flock of Yellow-rump warblers seasoned with a few palm warblers were flitting into the few rows nearest the edge. Of course, they might just have been avoiding the birders, but maybe they found insects in the corn, too. Someone said he thought there were bugs in the tassels, but the birds I saw were flying about a foot lower than that. Another mystery.