Humans and parrots battle in an 'arms race' over trash in Australia.

On one side are raven-size dumpster-diving parrots called sulfur-crested cockatoos; on the other are homeowners who'd like to stop cleaning up after the sloppy eaters. Like the parrots, humans learned from their neighbors, as the researchers discovered by asking more than 1000 people how they devised their cockatoo control methods. Humans and parrots battle in an "arms race" over trash in Australia. [Extracted from the article]