Unusual phenomen

While driving around between meetings and school presentations I sometimes encounter odd occurrences. On Tuesday, that was exactly what  I captured. 

A  flock of large birds caught my attention. I quickly made a decision to park the vehicle and try to get a picture. 

I even shot a quick video that shows typical behavior for flocks of white pelicans. Yes, that's correct! White pelicans in Southeast Missouri, near Mingo National Wildlife Refuge.