You may have seen on social media sites the map of butterflies moving through Oklahoma. This is the original story in which the maps appeared: A front full of butterflies swept through Oklahoma City on Saturday
The line on the map above isn’t rain, but from butterflies and dragonflies. We can surmise based on what has been happening along our shores that the species you see in this front are most likely a swirl of Monarchs, Painted Ladies, and Green Darner Dragonflies. The north easterly winds are carrying the insects south.
Below is a map showing autumn and spring migrations. The orange arow is the fall migratory route of the Monarchs.
Anything red represents rain. Blue indicates more unusual shapes, often biological in origin. Notice behind the “butterfly front” the large spattering of blue. That’s where the insects were. (GR2 Analyst)
Have you noticed the beautiful Painted Lady Butterfly flitting about your garden, in the meadows, along roadways, and even at the beach? I think we are having a Painted Lady irruption. The wave of Painted Ladies began appearing in large numbers this past spring, with reports of a dramatic increase in sightings in the midwest.
The Painted Lady is the most successful butterfly in the world. It lives some part of the year on every continent except South America, where it is rare or absent. Despite the fact that the Painted Lady is the most widely distributed butterfly, not a great deal is known about its migration. In North America the annual spring migration is thought to originate in the northwestern region of Mexico, where they can be found all year round. Heavy rains in late winter in that region trigger an explosion of northward migrating Painted Ladies that establish the spring brood.
I watched this little torn and tattered Painted Lady fly south over the Essex River, from Crane’s Beach to Wingaersheek Beach. She rested on a rock briefly, and then headed to the wildflowers in the dunes.