Nature photographers need to know their punctuation marks well. Last week I spotted an Eastern Comma butterfly (Polygonia comma) and this week on Monday I spotted its “cousin,” a Question Mark butterfly (Polygonia interrogationis) at Occoquan Bay National Wildlife Refuge.
I have always wondered what was going through the mind of the person that chose the official name of a given species. What caused them to focus on a particular characteristic in choosing the name? Was the person who named these butterflies a grammarian?
In the case of the Question Mark butterfly, the best identifying mark is visible only when the wings are closed. The Question Mark has white markings which more or less resemble a question mark (?) on the underside of its hindwings. (Check out the natureblog.org posting “A Question Mark, a Comma, and a Question of Origin,” to see examples of these markings.)
The good news is that there is also a way to identify a Question Mark when its wings are open—the Question Mark has four black spots in a line on each of its upper wings with the outermost spot somewhat elongated, as you can see in the first photo below.
For the sake of comparison, I am reprising a photo from last week of an Eastern Comma butterfly. I flipped it 180 degrees so it is easier to spot the differences. If you look at the butterfly in the second photo, you can see that there are only three spots on each of the upper wings, which makes it a Comma, rather than a Question Mark. (One sharp viewer last week suggested that they should have more appropriately named the butterfly with the three spots the “Ellipsis Butterfly” rather than the Eastern Comma Butterfly.) In case you are curious about the reasons for the “comma,” the butterfly has markings that look sort of like a comma (,) on the underside of its hindwings that are visible when the wings are closed.
Question Mark butterfly
Eastern Comma butterfly
© Michael Q. Powell. All rights reserved.
Mike Powell 