Auckland Zoo imported the founders of their current flock as chicks, not eggs. There was multiple quarantine requirements to be fullfilled including the condition that the youngest chick had to be a certain age before export could take place. The birds were all aged between six to eight weeks on the date of transfer.
It's such a shame that the Auckland Zoo can't supply some of the Australian Zoos now that their flock is breeding so well (six surviving chicks produced to date).
With the death of 'Greater' the Greater Flamingo and more recently the death of 'Chile' the Chilean Flamingo, the flock at Auckland Zoo has even greater significance as the only population of this species in the region. It's amazing to think that the six chicks produced over the last four years could live for another 60-70 years and with the founders aged only 17 years old themselves, the flock is hopefully sustainable for decades or even centuries to come.
With 22 flamingos in Auckland's flock, and hopefully further breeding to follow, I wouldn't be surprised if we saw one of the other major zoos take 8-10 of Auckland's flock to found their own population in the next decade or so. With such tight restrictions on imports, and Auckland's enclosure already looking full, this is surely the next step.