An enormous iceberg in Antarctica has killed off 150,000 penguins and threatens to wipe out an entire colony, which has become trapped and unable to reach food.
A study by researchers from New Zealand and Australia said only about 10,000 Adélie penguins have survived after an iceberg – labelled B09B - grounded in a bay in 2010.
The grounding, at Commonwealth Bay, has forced the penguins to make a 70-mile round trip to feed in the sea.
The iceberg is about 60 miles long and 1,120 square miles in size – larger than Luxembourg. It had apparently been floating around the coast for 20 years before crashing into a glacier and becoming stuck.
Penguin numbers have been recorded for more than a century.
"It's eerily silent now," said Professor Chris Turney, from the University of New South Wales.
"They can barely survive themselves, let alone hatch the next generation. We saw lots of dead birds on the ground ... it's just heartbreaking to see. "