KEY WEST, Fla. — This is a sign that spring is just around the corner.
The National Weather Service in Key West tweeted a radar image that show a massive amount of migratory birds heading north overnight.
The agency tweeted Monday morning that their radar had a busy night, but not because of rain.
Video with their tweet showed the "most impressive display of migratory birds so far this year."
NWS said the green/yellow images are birds flying north over the Keys while showers/rain are depicted in darker blues.
📡 Key West radar has had a busy night, but not because of weather! The most impressive display of migratory birds so far this year occurred overnight. This product shows biological targets in green/yellow flying north over the Keys. Showers/rain are depicted in darker blues. 🐦 pic.twitter.com/V2PJfucxJA
— NWS Key West (@NWSKeyWest) February 17, 2020
