In several neighborhoods of Sydney, Sulphur-crested Cockatoos have learned ways to open trash bins and grab some leftover food. Researchers found that birds in a given suburb seem to learn their trash bin opening technique from nearby birds, leading to subtle differences in how cockatoos raid the garbage throughout the city. This has pitted two highly intelligent species against each other as people have tried to come up with deterrence methods to keep birds away from the trash.

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