@snowleopard I did the zoo in about 1 hour and 15 minutes, but I spent quite a bit of time doing what I could for quality photos since there were none in the gallery before. For any person just walking through at a comfortable pace, it would probably take about 45 minutes or so.
The tigers are indeed advertised as the zoo's major attraction, and their exhibit was the only one in the zoo that I found unusually impressive. However, a ZooChatter could argue that the real attractions are the Hawaiian hawk and Hawaiian owl; AFAIK, both are only held in Hawaii and the owl is only held at this zoo. If only they held some of Hawaii's smaller natives as well...