Netherlands puzzles over death of estimated 20,000 guillemots

Scientists yet to figure out how the birds died after hundreds wash up on Dutch coast

Scientists are scrambling to understand the sudden death of an estimated 20,000 guillemots off the Dutch coast, hundreds of which are washing up on the country's shoreline.

The bodies of the birds, which spend most of their lives at sea where they dive for their food, started emerging over the past month, from the Wadden Islands in the north to Zeeland in the south.