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March 11, 2009
Landsat 7 helps track Antarctica's emperor penguins

Landsat 7 satellite imagery is used to track Antarctica's emperor penguins. This true-color image, acquired by the Enhanced Thematic Mapper Plus on the Landsat 7 satellite, 12-4-2002, captures brown stains of penquin guano. Researchers at the British Antarctic Survey (BAS), discovered that looking for guano stains is more reliable than looking for actual penguins since the birds' tuxedo colors blend in with the shadows on the ice. By locating penguin droppings, the BAS team identified 38 emperor penguin colonies along the Antarctic coast.