Singapore Night Safari is the first and maybe the only night zoo. There is a night animal show that starts at 7.30, 8.30, 9.30 pm but you'll need to be there 30 minutes ahead of time to get a place, its that crowded. Walking around the zoo will take you easily 3 hours. No flash allowed when you're taking photography, so bring along your f1.2 prime and 2.8 zooms. Entrance fee is $22.
Our Singapore Zoo is similar to the San Diego Zoo with open concept. Entrance fee is S$16.00 for adults. It opens at 9 am and closes at 6pm.
The Singapore Bird Park is another worthwhile place to visit with all kinds of birds flying freely and a man made waterfall thats a 100 feet high.