If you were looking at the radar here in southern Minnesota yesterday morning you could have guessed that there was some spotty rain in the area, when in reality it was something completely different. 

The National Weather Service in the Twin Cities tweeted a radar replay from around sunrise, saying a lot of "interesting phenomenon" showed up on radar. If you watch the radar replay in the tweet you'll see expanding circles, which the NWS says are birds flying away from lakes.


And if you can go WAY back to two years ago, LaCrosse, WI radar picked up all those mayflies emerging from the mighty Mississippi River.

Radar also likes to pick on on migrating butterflies too!