Two quite thought-provoking pieces re penguins and the use of flipper bands.
This is the general info piece from the BBC...
http://www.bbc.co.uk/news/science-environment-12162725
And this is a more detailed essay.
http://www.bbc.co.uk/news/science-environment-12162725
Bobbie
Interesting article Bobbie. Here's another on tracking Emperor Penguins by their Pooh from space.
Satellite images have picked up giant red-brown stains on the pristine white sea ice, indicating the presence of thousands of penguins.
It meant that researchers for the British Antarctic Survey were able to locate every colony on the continent for the first time ever.
The in-depth satellite survey identified 38 breeding colonies - believed to amount to between 200,000 and 400,000 breeding pairs of emperor penguins.
Until now it has been difficult to accurately estimate the population of emperor penguins because scientists have not been able to track them during the winter breeding season.
Researchers now hope by tracking the penguin colonies they can monitor the impact of climate change, which threatens to wipe out 95 per cent of the population by 2100.
This satellite image shows white Antarctic ice stained brown by Emperor penguin guano in Atka Bay in the northern part of Antarctica