Mating cercopia moths.
I spotted these moths at the bio-station in Pellston, mi
a lady there was raising them for release into the wild.
She told me that after the females emerge from their cocoon
that they do not fly, but they fan their wings to spread their pheromones
into the air to attract a mate. Soon after mating the female lays her eggs
According to wikipedia the cercopia moth is the largest moth in North America