Dead penguins wash ashore in Brazil

Wildlife experts are concerned and investigating the fact that 512 Magellanic penguins washed up dead across 65 miles of the Brazilian coast this month. Also worrying to veterinarians is that the birds were all apparently in good health, well fed, and free from oil stains. Magellanic penguins are migratory, moving from southern Argentina to Sao Paolo at this time of year. It's not a great time for penguins in general, with the population of a major colony in Antarctica plummeting 36% since 1991. http://www.abc.net.au/news/2010-07-20/dead-penguins-dolphins-wash-ashore-in-brazil/912612

This follows the mystery of the many dead dolphins and seabirds that washed up in Peru in May of this year. More info. in the following New York Times article:
http://www.nytimes.com/2012/05/08/world/americas/peru-has-no-answers-on-dead-dolphins-and-seabirds.html?pagewanted=all