It's very realistic. See a lot of these types of pens for small animals in zoos/sanctuaries. Nice work. Perhaps get some light into it, maybe by changing a part of the ceiling with something that's still secure but is translucent or has openings. Remember, with peafowls (and other non-dangerous animals) you can use a guest gate to allow your patrons to walk through the exhibit (if you so wish).
Yep i gonna put some light, for the gest gate i already made something else with a bit more building exibit like a tropical house. That was a test for a exibit more like a cage, like we see in park. I gonna had more screen when i updated it.
I'm actually thinking if i do the same for lemurs, in some zoo they live in that kind of exibit, but i'm more for the lemur island who match better for that.
I REALLY like that last screenshot. A much cooler way to display birds like this. It's really cool to see this kind of creativity from the community
Another idea I'd be interested to see is a large area of the walking paths turned into an "exhibit" for walkthrough animals where they can basically walk free among the guests like you see at many zoos.