Strange Occurrences:The "Black Sun" In Denmark Is Actually Hundreds Of Birds

It's hard to believe that so many birds could actually cause a blackout-type effect but it's true, Denmark sees it every year. What seems like something out of the famous Hitchcock film The Birds is actually the natural migration pattern of thousands of starlings.
It's been referred to as one of the most "magnificent" natural phenomena you can witness as it's amazing that a scale of this many birds flocks to one location simultaneously. It's referred to as Sort Sol in Denmark and lasts roughly 20 minutes, during which the sky appears much, much darker than usual.