I have never understood why the zoo only imported ten pairs. Flamingoes notoriously need large flocks for breeding. Very small flocks like Auckland's can produce eggs but it is in negligible numbers. The stated aim of the import was to start a sustainable flamingo population in NZ, and yet they only brought in the bare minimum. All they are going to achieve is a flock that produces a tiny irregular trickle of new flamingoes, hardly the basis for a sustainable population here. I could understand it if the 2001 import was like a trial run, to see if it all worked out, but there's no sign that that is the case.
There have recently (last couple of years) been some tentative breeding signs by the birds, but they are well into breeding age and if there had been a proper number in the flock then breeding would probably have started several years ago.
Like jay a few posts back, I'm sure I'd heard or read somewhere that the zoo was now thinking of the birds more as display than as a proper breeding flock.
Actually, the situation of Auckland with still 8.8 birds is not sooo bad. In case the flock should diminish by 2 or more birds, their breeding future would be practically hopeless, but with 16 birds, they still may achieve their initial goal, a sustainable zoo population. Because even such small flocks can still produce a good number of eggs/chicks annually, they just need to start breeding, zoo flamingos can be surprisingly productive.
Some example: Chomutov with 7.10 flock had 5 eggs (from 5 pairs) this season (all lost to vermin), Bojnice with 12.7 flock has currently 7 pairs either incubating eggs or leading a chick.
Auckland still has the unique possibility to start a zoo population of flamingos in NZ/Aus. It would be sad if they would give up now.