Red-spotted Purple Some of the bigger, showier, early summer butterflies are on the wane, but as we head into the last week of July, there's no lack of lepidopteran dazzle on the wildflowers. In fact, who needs blossoms at all? The Red-spotted Purple (Limenitis arthemis) often lands in the road or on rocks, perhaps seeking a mineral fix. At a quick glance, they're easily passed off as smaller, dark swallowtails, but up close, the differences are pretty obvious. For starters, of course, they lack tails.