We went to the Chiang Mai Zoo today and it whats buckets of fun! If you ever go, give yourself the whole afternoon. And don't get the tram pass, just a good pair of walking shoes, and then buy just one tram ticket when you want to leave.
It was a great zoo, very interactive, you could get quite close to the animals and often feed them. There were SO many different kinds of animals, birds and reptiles, and I took too many photos that I can't post. Soooo You'll get the idea, but my photos are a very limited representation.
Here are some pictures!