When the ISIS website first came online with the species abstracts I made a hobby of trolling through the species listings and compiling the collections of individual zoos (including Cincinnati). Doing so will make you go cross-eyed and head-achy, but it will give you a (reasonable) approximation of Cincinnati's current collection (at least for the vertebrates).
I was looking at amphibians kept in the UK when I saw this thread so I also looked at Cincinnati's amphibians. I don't know how up to date it is.
AMPHIBIANS
Streamside Salamander (Ambystoma barbouri) 1.1
Californian Tiger Salamander (Ambystoma californiense) 1.0.4
Jefferson Salamander (Ambystoma jeffersonianum) 1
Long-toed Salamander (Ambystoma macrodactylum) 1.0
Spotted Salamander (Ambystoma maculatum) 2
Two-toed Amphiuma (Amphiuma means) 1
Chinese Giant Salamander (Adrias davidianus) 1.0
Japanese Giant Salamander (Andrias japonicus) 2.1
Marine Toad (Chauncus marinus) 5
Chuxiong Fire-bellied Newt (Cynops cyanurus chuxiongensis) 3.2.23
Japanese Fire-bellied Newt (Cynops pyrrhogaster) 0.1
Green and Black Poison Dart Frog (Dendrobates auratus) 1
Blue Poison Dart Frog (Dendrobates azureus) 1
Yellow-banded Poison Dart Frog (Dendrobates leucomelas) 4
Yellow and Blue Poison dart Frog (Dendrobates tinctorius) 2
Northern Dusky Salamander (Desmognathus fuscus) 2
Seal Salamander (Desmognathus monticola) 1
Allegheny Mountains Dusky Salamander (Desmognathus ochrophaeus) 0.1
Alligator Newt (Echinotriton andersoni) 1.1.15
Cave Salamader (Eurycea lucifuga) 3
Spring Salamander (Gyrinophilus porphyriticus) 4
Grey Tree Frog (Hyla versicolor) 17
Clouded Salamander (Hynobius nebulosus) 4
Asian Painted Frog (Kaloula pulchra) 1
South Italian Newt (Lissotriton italicus) 1.1
Arboreal Mantella (Mantella laevirgata) 1
Frog (Melanophryniscus stelzneri) 1
Waterdog (Necturus) 4
Cuban Tre Frog (Osteopilus septentrionalis) 1
Black-spotted Brook Salamander (Pachytriton brevipes) 2.0
Unterstein's Brook Salamander (Pachytriton labiatum) 1.0
White's Tree Frog (Pelodryas litoria) 1.0.3
Golden Poison dart Frog (Phyllobates terribilis) 1
Northern Marine Salamander (Plethrodon electromorphus) 0.1
Northern Slimy Salamander (Plethrodon glutinosus) 6
Jordan's Salamander (Plethrodon jordani) 1
Rich Mountain Salamander (Plethrodon ouachitae) 1.0
Yonahlossee Salamander (Plethrodon yonahlossee) 2.1
Denny's Tree Frog (Polypedates dennysi) 1
Dwarf Siren (Pseudobranchus auritus) 1
Northern Red Salamander (Pseudotriton ruber ruber) 1.1
Spanish Fire Salamander (Salamandra salamandra bernardezi) 1.2
Like Ungulate I also look at ISIS regularly, One way which I do this is to higlight the collection I am interested in and the just look out for the name in red. Another way is of there is a large listing eg Anas, Macaca I just do a search for the collection name on that page.