"Climate Change Forcing Penguins North?"

Warm ocean currents may have confused some 2,500 penguins from Argentina's Patagonia region that washed up -- dead and alive -- on Brazil's northern coast.

About half the penguins that were found on Brazilian beaches in October were dead, and the others were starving and in very bad shape, said Valeria Ruoppolo, an emergency veterinarian with the International Federation for Animal Welfare (IFAW), in Sao Paulo, who coordinated the rescue of many of the penguins.

"Of the live ones, about 50 percent survived," Ruoppolo told Tierramérica.

Magellan penguins (Spheniscus magellanicus) live in relatively warmer climates than other penguin species, and breed and nest in burrows in the southern hemisphere spring and summer, from October to February, in southern Chile and Argentina, in a temperate and dry climate.

They travel out to sea during the winter, from March to September, to follow anchovies, their favourite food, in order to fatten up.

Juveniles also migrate north. This year, about 2,500 disoriented juvenile penguins traveled more than 2,500 kilometres beyond the normal point, coming ashore in Salvador, in Bahia state, 1,400 kilometres north of Sao Paulo, to the amazement of beachgoers. The penguins were rescued by IFAW and the Centre for Marine Animal Recovery, with help from other organisations and Brazilian environmental authorities.

After months of care and feeding, the 372 surviving penguins were banded and loaded onto a C-130 Hercules military plane and transported to Cassino Beach, in Pelotas, in southern Brazil.

After an overnight rest, they were released into the South Atlantic ocean, along with a few other rescued adult penguins, with the hope that they would guide the younger ones safely home to Patagonia.

About 200 people cheered them on as they waded into the surf. It was the largest penguin rescue on record, a success for animal welfare experts -- but a terrible omen for the penguin population.

"We always have a few strandings here and there. In 1994 and 2000 we had big strandings. But not like this year. More than 2,000 penguins is unheard of," Ruoppolo said.

Magellans are one of 17 species of penguins, which all live in the southern hemisphere, including the Antarctic. Magellans are among the largest, weighing just over four kilograms, with striking colouring: a white chest and a white band around a black back and black head.

The Magellan penguin population is fragile, as their numbers have plummeted by about 20 percent, with about one million breeding pairs today, according to the Wildlife Conservation Society. The penguins are at risk due to the effects of climate change, tourism, oil leaks from tankers and shrimp nets.