Through my work, I am always looking for resources explaining the simple basics of an exhibit for a specific species. Recently, I stumbled upon the World Association of Zoos and Aquariums' (WAZA) Virtual Zoo.
Here, you can search per species for info on exhibit sizing, husbandry, enrichment, and species behavior. This is an excellent starting point or supplement to other exhibit resources. Check it out here. I've also added the link to my Resources page.