By Nick Allen | Telegraph.co.uk
The bodies of more than 500 penguins have washed up on beaches in southern Brazil over the past week.
Marine biologists are investigating what caused the deaths of the 512 penguins found on beaches of the southern state of Rio Grande do Sul. The cause of death should be known in about 30 days.
The penguins were migrating north from Argentina in search of food in warmer waters. The birds appeared well-fed, unhurt and without oil stains.
Thirty samples from the penguins were being analysed at Porto Alegre University.
Veterinarians were puzzled by the large quantity of animals found and by the fact that they appeared not exhausted and without injuries.
The Magellanic penguins, named after the Magallanes region in which they breed, mate in large colonies in southern Argentina and Chile.
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