I have always found this list of New Zealand wildlife attractions rather fascinating and in my daydreams I consider the notion of meticulously planning out a Kiwi-themed road trip around the North and South Islands...although finances will likely ensure that such an event never happens. It seems as if many of the attractions on the list would be considered borderline whether they would qualify as a "zoo" but that is the case everywhere in the world. I wonder if anyone has a list of the top 10 zoos in the nation in terms of attendance? Would it be a fairly steep drop-off after the facilities in Auckland and Wellington? Also, judging by driving distances it seems as if a zoo enthusiast could rent a car and see quite a large number of small attractions in a single day, especially on the North Island.
think of the list as being of "animal collections" rather than "zoos".
As zooboy28 says, except for certain clusters (within Auckland or Christchurch, for example) it would be difficult to see many collections in one day because of the driving conditions - it may not look far on a map but the roads are winding, highways are often one lane, and some roads won't even be sealed.
In terms of visitor numbers, the smaller places would be between 25,000 and 65,000 per year. I did some random googling for the larger zoos - it's a bit hit-and-miss due to what is easily available online:
*Auckland Zoo: 717,000 (in the year-period mid-2013 to mid-2014)
*Kelly Tarltons: 360,000 (in 2005)
*Wellington Zoo: 203,000 (in 2011)
*Orana Park: 160,000 (in 2010, pre-earthquakes)
*Hamilton Zoo: 128,500 (in the year-period mid-2014 to mid-2015)
*National Aquarium of Napier: 99,216 (in 2010)
Note that the population of NZ is about 4.5 million, about 1.4 million of whom live in Auckland. The whole of the South Island has just over one million people.