Millions of dead sardines washed up on a beach in southern Chile. The cause of their death is under investigation. PATRICIO OLIVARES/FOR THE MIAMI HERALD

Chilean scientists are investigating three mysterious ecological disasters that have caused the deaths of hundreds of penguins, millions of sardines and about 2,000 baby flamingos in the past few months. The events started to unfold in March, when the remains of about 1,200 penguins were found on a remote beach in southern Chile. Then came the sardines — tons of them — dead and washed up on a nearby stretch of coastline. The stench forced nearby schools to close, and the army was called in to shovel piles of rotting fish off the sand.

Farther north, thousands of rare Andean flamingos abandoned their nests on a salt lake in the Atacama Desert. The eggs failed to hatch and, over a period of three months, all 2,000 chicks died. The extent of the damage was discovered in April, during an inspection.

Farther north, thousands of rare Andean flamingos abandoned their nests on a salt lake in the Atacama Desert. The eggs failed to hatch and, over a period of three months, all 2,000 chicks died. The extent of the damage was discovered in April, during an inspection.

No one knows for sure what caused these three apparently unrelated ecological tragedies, although there are many theories. Global warming has been blamed, as have overfishing, pollution and bacterial disease. In the north, ecologists have accused mining companies of fatally altering the flamingos’ habitat by draining the area of subterranean water.

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