A large number of penguins have fallen victim to an oil slick off the coast of Brazil.

AP quotes Marcelo Duarte of the Santa Catarina state environmental police as saying 200 birds have washed up dead since Sunday. Manuela Osorio, a vet caring for around 150 survivors, told the wire service hundreds more were being reported by citizens and some Brazilian media sources are putting the number of dead at 2,000 penguins.

Duarte says the Navy is searching for the source of the oil slick — presumed to be a large leaky ship.