a substantial windstorm broke open the cages and the birds escaped...only to start a very successful breeding population in the wild
I heard a similar reason for the semi-official bird of the Island of Kauai. It's these red roosters, they are wild, and are literally everywhere on the island. When we vacationed there, someone said that there was a big storm, broke all the cages, and they were let loose on the island with no natural predators, something like that. There are places where you park, and they'll waltz right up to your car. Murphy is even in Hawaii...
_________________________
- Ron