The scene is set with two young women — Sophie Windsor Clive and Liberty Smith — on a casual canoe trip on the River Shannon in Ireland. Under heavy skies, they make their way to a bird-infested island where they witness a gathering of starlings — a “murmuration” — that is so phenomenal and surreal that it's almost poetry in motion. If this story sounds familiar, it might be because their simple, two-minute film — called Murmuration — went viral last year. Island is a longer, yet equally compelling, version of an unforgettable paddling adventure.