profit

This may already be an existing thread, however I was wondering which zoo animals are the most money-making in zoos. For example pandas may attract more visitors, however the cost of having pandas (not to mention the added government loan costs) most likely means pandas are not money-making...

So I've recently derailed two threads thanks to a chip I have on my shoulder with regards to wildlife conservation. I figured I should outline my views here (and more importantly how I developed this chip) so I can argue about it without (hopefully) derailing any more threads. Like many people...

What animals (other than pandas) are the most popular in zoos and earn the zoo profit. What animals do you think are not profitable?