Look up into the clear blue sky in the spring or fall and you may not see them, but oh boy, are they there.
Trillions of them, in fact, riding the high air currents to breeding grounds and back again. Insects ranging from microscopic to splatter-worthy fill the skies around the world each year as they migrate seasonally. A recent study from researchers in the United Kingdom found that in southern England alone, more than three trillion insects passed by each season. That’s more than 400 t