Regardless of how or why, starling murmurations are without-a-doubt one of the most peculiar natural phenomena in the sky.
This might look like an egregiously misplaced school of fish, but it's actually an example of what ornithologists (bird experts) call a murmuration:It's a flock of hundreds to thousands of tiny song birds called starlings. But exactly how the birds within these swarms decide to move and when is a complete mystery.
Within a murmuration, starlings are constantly on the move, so the shape is always changing. 
But some photographers managed to capture some incredible, split-second moments of these flowing flocks that look strikingly similar to common shapes like a gigantic smoking pipe, goose, and sting ray. Check them out below: