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Christina Larson14:32, Jul 23 2021 Barbara Klump/Max Planck Institute of Animal Behavior In this 2019 photo provided by researcher Barbara Klump, a sulphur-crested cockatoo opens the lid of a rubbish bin in Sydney, Australia. A few years ago, a Sydney scientist noticed a sulfur-crested cockatoo opening his rubbish 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 bin lids in 44 suburbs.

United statesNew south walesUnited kingdomLos angelesLucy aplinDirene pepperbergIsabelle laumerBarbara klumpUniversity of californiaAustralian museumMax planck institute of animal behaviorMax planck institute aplinAustralian museum majorMax planck instituteRichard majorAnimal behavior