On the Sunny Beaches of Brazil, A Perplexing Inrush of Penguins - washingtonpost.com

It is normal for Magellanic penguins, which spend months in the ocean, to leave their colonies in southern Argentina and ride the plankton-rich frigid waters of the Falkland Current, which flows north up the coast of South America from Antarctica, in search of sardines. The eddies from a second current, the Benguela of southwest Africa, travel across the Atlantic toward Brazil. While the penguins would normally turn back when they hit the warmer Benguela waters, the current has been "exceptionally cold" this year, Braga said. Adding to this, the Falkland Current, fortified by strong winds, has been particularly powerful.