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Good to know! We've only been to a couple of national parks (where we saw gibbons too) and the Bangkok Zoo, which is actually pretty well done...

Ah really, heard from a few people including Sam's sister that the Bangkok Zoo (Dusit area) is quite small for the animals in there. But maybe it had refurbishment since she's been there.
All the national parks in Thailand are great, but it's a shame they charge a big difference for tourists. Which deters us going regularly.

I think we enjoyed the zoo because our expextations were so low :)