National Weather Service offers up radar images of migrating butterflies

Seen lots of butterflies lately? Radars have, too, and their behavior isn’t exactly typical.

The National Weather Service out of Boulder posted two radar images on their Twitter Tuesday showing a giant blob of blue and red to the uneducated eye.

But meteorologists could tell that these images showed the migration of what was first believed to be birds, but later determined to likely be butterflies after the agency received several reports about the flying insects…

The flurry of activity started around sunrise Tuesday and continued throughout the day, he said. Migrating birds with their big wings and need to fly together in the same direction as the wind commonly produce a coherent radar signature like the one seen. It’s rare for insects to do that but a high quantity of migrating butterflies could…

Better than watching manmade chaff on the radar screen. Any day. Any night.