When the days grow mild and the snow melts, I start to watch for Mourning Cloaks. This one appeared to have claimed our patio as his territory today, flying away every time we walked past but returning a few moments later (this is typical male butterfly behavior).
These elegant-looking butterflies are always among the first to emerge, and with good reason. See how the trailing edges of his wings are looking a bit tattered? Well, you’d look a bit tattered too if you’d spent the Wisconsin winter out in the woods, hiding under a rock and pumping natural antifreeze through your body to keep ice crystals from forming inside your cells. Yes, Mourning Cloaks actually hibernate through the winter as adults, sheltering among the rocks and debris of the forest floor. This means that they can emerge to fly on the very first warm day of the year, while other butterflies are still working on metamorphosis. It also means that they have one of the longest adult lifespans of any North American butterfly – 10 to 11 months.
Their name comes from a supposed resemblance to traditional mourning clothes (I tried to find more information about this, with no luck). The underside of their wings is less flashy, letting them instantly switch from colorful display to dead leaf disguise.
By the way, if you’re wondering what these early-flying butterflies eat when there are no flowers to speak of yet, the answer is simple – just like us maple sugaring humans, they know that this is the time of year when the sweet sap is running in the trees and weeping down their trunks. Delicious!
One moment of nature blog serendipity before I go – on Monday Elizabeth of Woods Walks and Wildlife posted photos of male and female hazelnut flowers where she lives in Connecticut. Well, today I stumbled upon a blossoming hazelnut of my own here in Wisconsin and instantly recognized it thanks to her.
Have a great rest of your week!