On Saturday evening, people glancing at the sky over parts of Great Falls may have seen a rather unusual sight: a murmuration - a large flock of birds that move in parallel, mimicking the moves of surrounding birds, creating a "moving cloud" of activity.

It happened between about 6:30 p.m. and 6:45 p.m., as the birds swooped and swirled again and again, creating a mesmerizing display that could be seen for miles.