This appears to be a starling murmuration, but this looks almost like a swarm of insects about to invade downtown Casper.

This 'swarm' of birds were in perfect unison as they soared and circled around the First Interstate Bank sign in downtown Casper. This is not something I see very often.

If you were in the downtown area around 4:30 PM today (11/7),  you most likely got an unexpected visual treat from above.