The Antarctica emperor penguins are endangered. Due to the global temperature increase, the ice in the south will melt quickly and the birds will lose their natural habitat. Scientists use satellite images in order to investigate the number of penguins in the Antarctic. Since the penguins are hard to detect due to their black and white feathering, scientists look for their excrements. In the middle of the picture, you can see brown lines that cannot originate from the ice and thus must be organic: This so-called seabird guano clearly indicates the presence of a penguin colony.
Picture taken on December 4, 2002
Sensor: Landsat 7 ETM+