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 arrow 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)