Metro UK - The birds are thought to get into their inebriated state by eating a particular plant that makes them exhibit all the tendencies of having overdone it on the sauce. According to Ark Animal Hospital vet Dr Stephen Cutter, the birds act in a drunken manner and then fall over: ‘It's probably a plant with alcohol, or toxins in a plant making it worse’. The birds typically start out by making a lot of racket on a Friday night at the Palmerston Markets, followed by more loud drunken behaviour before they eventually fall over. The morning after is said to be very bad for the seriously hungover parrots, who can be sick for up to three days.
I think this pretty clearly illustrates the difference between us and Australians. Australians are content to laugh and drink along side the birds, and all in all are down for a good time. Americans would criticize, impose bird age and substance limits and all in all look to ban the bird population from making their own decisions and having a good time. Pretty glaring difference.