So here are two enclosures / exhibits that caught my eye and interest. Both pertain to endangered bat species and specifically megabats.
I've only seen one of these in person (Bristol zoo) as I have never been to Jersey zoo (though I would like to in the future).
Bristol zoo - Livingstone's fruit bat enclosure
The Bristol zoo enclosure impresses me because it is a walkthrough and allows for close contact between the public and the bats. It is also an immersion style exhibit which I believe has strong educational value in helping to instill empathy and fascination for these endangered species in the visiting public.
The enclosure is furnished with lots of climbing materials and the bats can use the mesh itself to hang from and clamber around so that the enclosure itself is actually a form of enrichment for the bats. As I remember it there are several furnishings where fruit can be hung from branches and hanging wires so the bats can receive enrichment.
When I visited Bristol many years ago this walkthrough was one of the highlights of the trips and created strong memories almost two decades on which I guess says something about the design.
Jersey zoo - Livingstone's and Rodrigues fruit bat tunnel enclosure
The Jersey Zoo enclosure which holds both Livingstone's and Rodrigues fruitbats is interesting for me for several different reasons. First of all it is quite significant in historic terms because although it isn't the original enclosure for the first individuals kept it was at Jersey where the ex-situ captive breeding of both species was successful which ultimately has saved the species for the forseeable future.
The second reason I like this enclosure is it's ecological / green design and the enormous attention paid to the husbandry needs of the species. It is apparently an incredible 800 square metres which allows the 54 bats kept here to have ample room to fly around in and this may make them even more prepared should they be reintroduced back to the wild at some point.
In addition is well planted and is furnished with plenty of climbing materials and enrichment for the bats to hang onto and check out. Another quality of this enclosure which is quite unique is that it generates its own heat
There was actually a scientific paper written and published last year on how the enclosure design of this bat house has improved the health / wellbeing of its occupants. I'll post a link to the paper below, all you need to do to read it is copy and paste the title
"Flight patterns in zoo‐housed fruit bats (Pteropus spp.)" into sci-hub.com and you can download and read.
https://onlinelibrary.wiley.com/doi/abs/10.1002/zoo.21481