This video is guaranteed to make you smile!

Watch this amazing and unexplained natural phenomena captured by two girls unexpectedly while canoeing on the River Shannon in Ireland.

Wait 25 seconds into the video to see thousands of starlings gather and swirl in an unbelievable dance. This collective and synchronized movement of the birds is called a murmuration, hence the name of the video.

The footage shows the precision of the harmonized dips and waves created by the birds. Flying only wingspread apart, the birds react within a millisecond, copying the bird ahead of them. This creates the unique ripple effect seen from afar. Scientists are stumped by the way the birds can process and react so quickly. This phenomenon is increasingly rare in the UK. Scientists say that this is due to a decrease in the amount of suitable nests for the birds.

Sophie Windsor Clive and videographer Liberty Smith were lucky enough to capture this chance encounter. The duo submitted the film to the World Wildlife competition Life, Nature and You. Make the Connection. The video has since become a sensation on Vimeo. The song playing in the background is by group Nomad Soul and is now available on iTunes.

Murmuration from Sophie Windsor Clive on Vimeo.