Fermilab, Kane and DuPage Counties, Illinois
August 26, 2001
This Giant Swallowtail was fluttering its wings continuously while at the thistle flowers, as many swallowtails do while nectaring, until a gust of wind pushed its wings forward for a few seconds, giving this clear view of the upperside, but odd pose. This was a rather tattered individual, with both tails missing.
Photo by Tom Peterson