Scientists aim to uncover why puffin population is on the wane

Work is under way to root out the cause of a worrying decline in the global population of puffins.While the beloved birds are thriving in parts of the UK, including the remote Skomer Island off the coast of Pembrokeshire, elsewhere their numbers are on the wane.In Iceland, for example, there are 25% fewer puffins than there were in 2002.