Crafty cockatoos master dumpster diving and teach each other

WASHINGTON (AP) — A few years ago, a Sydney scientist noticed a sulfur-crested cockatoo opening his trash bin. Not every resident would be thrilled, but ornithologist Richard Major was impressed by the ingenuity.

It’s quite a feat for a bird to grasp a bin lid with its beak, pry it open, then shuffle far enough along the bin's edge that the lid falls backward – revealing edible trash treasures inside.

Intrigued, Major teamed up with researchers in Germany to study how many cockatoos learned this trick. In early 2018, they found from a survey of residents that birds in three Sydney suburbs had mastered the novel foraging technique. By the end of 2019, birds were lifting bins in 44 suburbs.

“From three suburbs to 44 in two years is a pretty rapid spread,” said Major, who is based at the Australian Museum.

The researchers’ next question was whether the cockatoos had each figured out how to do this alone – or whether they copied the strategy from experienced birds. And their research published Thursday in the journal concluded the birds mostly learned by watching their peers.