We have lots of these in our yard. Lots.
A thistle is a spiky, thorny, gnarly, troublesome weed until a butterfly lands on one to feed, then it looks beautiful to me. I didn’t catch a butterfly on this one, but it did have some friends the first time I photographed it.
I didn’t see the antennae until I loaded the photo onto my computer and, of course, the little friends weren’t there when I went back outside hoping to get a photograph of them in focus.