No it's not a cat door, it's a vent, useful due to all the heating needed for the indoor areas, it's often hard to see inside due to the heat on the glass.
It is only an extension to the Iguana enclosure as they are allo9wed out when it is warm enough, the enclosure was built a couple of years ago.
I got the impression that it just holds whatever surplus animals they have - was a mix of the three species above plus Golden-headed Lion Tamarin when I was there, but only singles of most of them.
No it's not a cat door, it's a vent, useful due to all the heating needed for the indoor areas, it's often hard to see inside due to the heat on the glass.
It is only an extension to the Iguana enclosure as they are allo9wed out when it is warm enough, the enclosure was built a couple of years ago.