Then it seems a little high?
If I were to guess at where each zoo fits into lintworm’s categories, I think it’ll be something like this. Question marks are where I suspect they might be close to falling below the cut-off in that category.
1,000,000+
Melbourne
Taronga
Sea World
Dreamworld
Sydney Aquarium?
500,000-1,000,000
Irwinland
Adelaide
Perth
Auckland
Melbourne Aquarium
Kelly Tarlton?
250,000-500,000
Healesville
Werribee
Cleland?
AQWA
Wellington
Sea Life Sunshine Coast
100,000-250,000
Lone Pine
Monarto
Caversham?
National Zoo and Aquarium
Featherdale
Ballarat
Currumbin
Dubbo
Australian Reptile Park
Cairns Aquarium
Obama
Hamilton
Maybe there’s a couple of dubious cases like Melbourne Aquarium and Blackbutt Reserve doing a lot of work. I think Seaworld’s case for being a ‘zoo’ is a lot stronger than Dreamworld’s too, but I suspect the latter might make up something approaching 10% of the 22 million figure.