Meanwhile, the nearby chinstrap penguin colony of Bailey Head, which is usually visited by 2,000 to 3,500 people every season, showed a decline of about 50 percent. (scientificamerican.com)
As climate change became a concern, researchers assumed that warming would favor the ice - avoiding chinstrap penguins, sending the Adelies into decline as more and more of their winter sea - ice home disappeared. (scientificamerican.com)