Zabulon Skipper - Rare Mosaic Gynandromorph
Gynandromorphism occurs when an organism has both male and female characteristics. They can be "bilateral" in which one side is female and the other male or "mosaic" in which there is a blending of traits throughout the organism. The mosaic form is much rarer.
Last year I was hiking the trails in Elkridge, Maryland and saw several Zabulon Skippers nectaring on some thistle in peak bloom. I walked closer and saw a skipper that I did not recognize. It’s funny how your brain tries to process what you are seeing for the first time. It took me a few seconds to figure out that this butterfly was, in fact, a Zabulon Skipper. But what a skipper it was! It had both male and female characteristics. I have seen rare gynandromorph photos of Swallowtail butterflies with one side female and the other male but this one showed a blending of traits throughout. For example, the underside of a normal Zabulon male skipper is yellow orange with several small brown spots and the female is dark brown and purple gray with a white-edged coastal margin. This one showed the dark brown color and white-edge of the female along with the yellow orange markings of the male. I have never seen anything quite like it. I started taking photos from all angles.
Upon returning home, I emailed Harry Pavulaan, a world-renowned butterfly expert and friend, with photos of my find. Harry’s response, "In a nutshell: WOW. Gynandromorphs, in this case a mosaic gynandromorph, usually are only noticed in Swallowtails and species where males and females look quite different. But what makes this one yet more significant is that it’s a skipper. I have never seen or heard of a skipper with mosaic gynandromorph features. You may be the first to document this, though it’s possible there are older reports of bilateral gynandromorphs out there."
After later investigations and subsequent emails, it turns out that this Zabulon Skipper may be the only North American Skipper ever documented with mosaic gynandromorphism.
A short article appeared in the "Taxonomic Report of the International Lepidoptera Survey, Volume 10 Number 2, April 20, 2022" (Pages 9-10). If you are interested, the article has more photos of this amazing butterfly, and the link is below:
lepsurvey.carolinanature.com/ttr/ttr-10-2.pdf
Explored October 22, 2022
Zabulon Skipper - Rare Mosaic Gynandromorph
Gynandromorphism occurs when an organism has both male and female characteristics. They can be "bilateral" in which one side is female and the other male or "mosaic" in which there is a blending of traits throughout the organism. The mosaic form is much rarer.
Last year I was hiking the trails in Elkridge, Maryland and saw several Zabulon Skippers nectaring on some thistle in peak bloom. I walked closer and saw a skipper that I did not recognize. It’s funny how your brain tries to process what you are seeing for the first time. It took me a few seconds to figure out that this butterfly was, in fact, a Zabulon Skipper. But what a skipper it was! It had both male and female characteristics. I have seen rare gynandromorph photos of Swallowtail butterflies with one side female and the other male but this one showed a blending of traits throughout. For example, the underside of a normal Zabulon male skipper is yellow orange with several small brown spots and the female is dark brown and purple gray with a white-edged coastal margin. This one showed the dark brown color and white-edge of the female along with the yellow orange markings of the male. I have never seen anything quite like it. I started taking photos from all angles.
Upon returning home, I emailed Harry Pavulaan, a world-renowned butterfly expert and friend, with photos of my find. Harry’s response, "In a nutshell: WOW. Gynandromorphs, in this case a mosaic gynandromorph, usually are only noticed in Swallowtails and species where males and females look quite different. But what makes this one yet more significant is that it’s a skipper. I have never seen or heard of a skipper with mosaic gynandromorph features. You may be the first to document this, though it’s possible there are older reports of bilateral gynandromorphs out there."
After later investigations and subsequent emails, it turns out that this Zabulon Skipper may be the only North American Skipper ever documented with mosaic gynandromorphism.
A short article appeared in the "Taxonomic Report of the International Lepidoptera Survey, Volume 10 Number 2, April 20, 2022" (Pages 9-10). If you are interested, the article has more photos of this amazing butterfly, and the link is below:
lepsurvey.carolinanature.com/ttr/ttr-10-2.pdf
Explored October 22, 2022