the zoo imported 20 birds (10.10). Two died in quarantine in 2001, and one was killed by a zoo visitor in 2002 (rocks were thrown at it and its legs were broken). I'm not sure what happened to the fourth bird that died (I thought two had been killed in the rock attack but the newspaper report I found said only one).
Here's the report:
Zoo shocked by flamingo attack | Television New Zealand | News, Sport, Weather, TV ONE, TV2 | TVNZ | NATIONAL News
Here's the IZY article that zooboy28 posted a link to (except this one is one you can actually open and read

):
http://www.flamingoresources.org/docs/literature/hand_rearing_wwt_auckland_jarrett.pdf
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.