Elephants are revered in Sri Lanka but are also endangered. Their numbers have dwindled from about 14,000 in the 19th century to 6,000 in 2011, according to the country’s first elephant census.

They are increasingly vulnerable because of the loss and degradation of their natural habitat. Many venture closer to human settlements in search of food, and some are killed by poachers or farmers angry over damage to their crops.

Hungry elephants seek out the waste in the landfill, consuming plastic as well as sharp objects that damage their digestive systems, Pushpakumara said.

“The elephants then stop eating and become too weak to keep their heavy frames upright. When that happens, they can’t consume food or water, which quickens their death,” he said.