Be prepared to walk.

Be prepared to walk.
I personally prefer walking the zoo and spend as much time as I need at my own pace. Bus tour does not get you close to the zoo animals.
My favourite was the three polar bears playing in the water. You can get real close to the action.
Tigers were great and my kids loved reptiles.
Review the map and plan out the path. Easy to waste your time and miss exhibits.
I wish the map had recommended possible walking paths.
They let you bring your own food and drinks. Do bring your own. I saw a few people with wagon. May work for you, too.