I haven't seen any monarchs yet this season. I saw a few painted ladies..but they seem so much smaller than in years past and a blk swallowtail. My milkweed smells so beautiful...a bit more intoxicating than honeysuckle...but that kind of scent. The blooms are covered with HONEYBEES! Happy, happy bees!
I have cabbage white butterflies, sulpher butterflies, summer azure butterflies, and eastern swallowtail butterflies around my yard. There is also a butterfly I have been seeing lately that I can't identify. It's mostly black with some orange and brown.
I plant extra parsley for swallowtail larva. I am usually enthralled by this point in the season with watching the caterpillars grow through their various instars. I watched a swallowtail female lay her eggs on my cutting celery in early June. I watched the cats hatch and grow pretty large in their first instars. Then birds picked them off. I haven't seen any caterpillars since, and I am sad about it.
I saw this yesterday and immediately thought of a Pipevine Swallowtail. It's not likely, unless you happen to have a plant called Dutchman's Pipe in your garden. The plant is to the swallowtail what milkweed is to the Monarch.
Meanwhile, I found a site that might interest you: it's called Gardens with Wings, It assists you in filtering your way through options to maybe find a name!
Well this is alarming! I just checked to see if they fly in Iowa? I found that it does, but here's the twist: The butterfly depends on a plant called Pipeline (Go figure!) and there is a species of Pipevine that grows in what I will generalize as "the south". If you didn't think Iowa is in the south, just understand that the list of states where Giant Pipevine grows is mostly southern but includes, yes, Iowa.
Here is a page to tell about Aristolochia gigantea , a Pipevine species that kills the caterpillars. Similarly, there is one milkweed that kills Monarchs.
Bottom line? The butterfly is typically found around the pipevine plant, so if you have some from a nursery and it's in bloom, good chance, The pipevine flowers look like old Dutch pipes, if you wondered.