Disturbing? Or just neat? However you look at it the fact is that released cage birds in Australia have been rejoining wild flocks of their kind which then learn to say things that the previously-caged birds have been taught to say:
“We have had people call us thinking they are going mad or had something put into their drink because they’ve gone out to look at the flock of birds in their backyard and all the birds have been saying something like: ‘Who’s a pretty boy then’?” the Australian Museum’s naturalist, Martyn Robinson, said yesterday.
Weird.
The Kaka in Wellington are descended from birds bred in Auckland Zoo, where a keeper taught one to wolf-whistle. All the Kaka now use a modified version of that whistle in their frequent calling. Cultural contamination!