Jurong Bird Park is a lot of fun. I suggest going early to avoid the crowds, perhaps prebuy your tickets because the queues are outrageous.
I recommend taking the tram to get an idea of the whole park first before splitting off to follow your nose.
I visited Jurong Bird Park through RMG Tours-i do not recommend this. It takes too long in transit and I didn’t get as much time at the park as I wanted. You should Spend a while there, there is a lot to see and do, the variety of birds is impressive and their enclosures seem elaborate and reasonably natural.
A lot of the park seems to be a bit run down and out of date, undergoing maintenance and the like. It’s still in working order and there’s still a lot to see, but it’s not a modern, seamless experience like the Night Safari.