Peacock Plague

New Zealand (especially the North Island) appears to be having problems with Jade and green peafowl. These birds, like many problematic species, were introduced for entirely decorative reasons. Peafowl have now become feral.(https://www.theguardian.com/world/2020/oct/31/no-predators-plenty-to-eat-new-zealand-struggles-with-plague-of-peacocks). As they lack predators (due largely to programmes to eliminate wild ferrets, stoats and rats) and are surrounded by mountains of food (farmers provide them with clover, corn and maize), their numbers have rocketed. Peafowl are now regarded as a major pest by farmers. I suspect that the raucous calls of the Peacock drives them to distraction. Most problematic alien species of animals and plants are introduced by 'fanciers' and gardeners.