It is one of nature's most spectacular sights...and still something of a mystery to birdwatchers. Despite a vast sky to explore, thousands of starlings come together to swoop and sweep before finally settling down for the night. This stunning roosting display, known as a murmuration, was captured by photographer Andy Rouse at Slimbridge Wildfowl and Wetland Trust in Gloucestershire. The displays occur in many parts of the UK with reedbeds attracting gatherings which can number millions. (Source: Daily Mail)