QUESTION: Is it possible to tell a male from a female monarch butterfly? Jun23 MONARCH BUTTERFLY (Male) It sure is. All you have to do is to catch a glimpse of the top side of a monarch with its wings spread. Male monarchs will sport a dark spot on one vein running down the hind wing. Female monarchs do not this spot. The monarch shown is a male. Share this:EmailFacebookMoreTwitterLike this:Like Loading...