Rarest animals seen in a zoo or aquarium

Cypselurus said:
Ah, okay. Thanks for the headsup :)
Also, did you see the wild Mandarin Ducks and/or the local Raccoon-dogs?
Click to expand...
yes I have seen both mandarin ducks and raccoon dogs wild in Shanghai.


EDIT: that was my 12,000th post!!!
 
Resurrecting this thread,I have see

Giant panda(HK ocean park)
Snub-nosed monkey(HK ocean park)
Manta ray(HK ocean park)
Bali myna (HK avairy)
Golden takin (Chimelong safari park)
Emperor penguin(Chimelong ocean kingdom)
West african manatee(Chimelong ocean kingdom)
Beluga(Chimelong ocean kingdom)
Commerson's dolphin(Yokohama sea paradise)
Short finned pilot whale(Yokohama sea paradise)
Tasmanian devil(Rare outside australia,tama zoo)
Black faced spoonbill(Tama zoo)
Caspian seal(Kamogawa sea world)
Ringed seal (Kamogawa sea world)
Flying dish(Rarest one,kamogawa sea world)
Okapi(Ueno zoo)
Shoebill(Ueno zoo)
Chinese pangolin(Ueno zoo)
Aardvark(Ueno zoo)
Southern tamandua(Ueno zoo)
Aye-ayes(Ueno zoo)
 
Arizona Docent said:
mammals
northern white rhino (San Diego Wild Animal Park)
sumatran rhino (Los Angeles Zoo, San Diego Zoo, Cincinnati Zoo, Bronx Zoo)
black pampas cat (Cincinnati Zoo)
white serval (Big Cat Rescue)
northern cheetah (Chester Zoo)
jentinks duiker (Gladys Porter Zoo)
harnessed bushbuck (Gladys Porter Zoo)
mountain tapir (Los Angeles Zoo, Cheyenne Mountain Zoo)
white eurasian lynx (Nashville Zoo)
white faced and footed spectacled bear (Houston Zoo)
white crested porcupine (London Zoo)

reptiles
perentie monitor (Dallas Zoo)
patternless diamondback rattlesnake (Arizona Sonora Desert Museum)
Click to expand...

Perenties are at Australia zoo as well...
 
Melanistic White-tailed deer

Is anyone aware of any exhibit locations where melanistic white-tailed deer can be viewed?
 
I was unaware about the existence of this thread. Looks like delicious for a rare-species lover (like me), hehe. So I dedicated today to elaborate my list. The major problem is that, since ISIS disappeared, I don't count with any tool to know which species can be considered rare worldwide. I used Zootierliste and made my list of sightings in zoos whose species (at a whole, including subspecies and so) are in 0 to 5 zoos in the area covered by Zootierliste (Europe, asian Russia and Near East). But probably a bunch of american native animals that are rare in European zoos are common in American zoos, maybe great blue heron for example. So I need help from people looking at my list and telling me which species they consider "too common" worldwide, so I can made a more accurate list.

I don't include invertebrates because Zootierliste don't count them, despite many of them could being counted as rare. I also don't include rare species seen in pet/aquarium shops, particular houses (including my own fishes), temporary animal exhibits (where I saw the only tree-kangaroo in my life), etc. But I include any public institution that displays living exotic animals permanently, such as certain natural history museums or botanical gardens that have some terrariums and aquariums.

I don't included subspecies, variants, forms or whatever under the species level. Also, notice that I tend to be conservative in my taxonomic squills.

So, these are the species that I saw (most of them also photophraphed, but some of them unfortunately I was unable to do), that are in five or less zoos covered by Zootierliste:

MAMMALS

Aardwolf (Proteles cristatus) - Berlin Tierpark
African clawless otter (Aonyx capensis) - San Diego Zoo
Allen's swamp monkey (Allenopithecus nigroviridis) - San Diego zoo
Argali (Ovis ammon) - Berlin Tierpark
Aye-aye (Daubentonia madagascariensis) - London Zoo
Baird's tapir (Tapirus bairdii) - Berlin Zoo-Aquarium
Barking deer (Muntiacus muntjack) - Faunia Madrid
Bearded pig (Sus barbatus) - Zoo-Aquarium Berlin, Munich Zoo
Black agouti (Dasyprocta fuliginosa) - Faunia Madrid
Black duiker (Cephalophus niger) - San Diego Zoo
Brandt's vole (Lasiopodomys brandti) - Plzen Zoo
Brown dorcopsis (Dorcopsis muelleri) - Prague Zoo
Brown hyena (Hyaena brunnea) - Berlin Zoo-Aquarium, Prague Zoo
Chacoan Peccary (Catagonus wagneri) - Berlin Tierpark, San Diego Zoo
Chinese ferret-badger (Melogale moschata) - Prague Zoo
Chinese pangolin (Manis pentadactyla) - Taipei zoo
Congo basin Wolf's monkey (Cercopithecus wolfi) - San Diego Zoo
Formosan serow (Capricornis swinhoei) - Taipei Zoo
Gambian epauletted bat (Epomophorus gambianus) - Berlin Tierpark
Gerenuk (Litocranius walleri) - San Diego Zoo
Giant panda (Ailuropoda melanoleuca) - Berlin Zoo-Aquarium, Madrid Zoo-Aquarium, San Diego Zoo
Hammerhead bat (Hypsignathus monstrosus) - Plzen Zoo
Hispid cotton rat (Sigmodon hispidus) - Plzen Zoo
Hoffmann's two-toed sloth (Choloepus hoffmanni) - Faunia Madrid
Killer whale (Orcinus orca) - Zoo Barcelona, Loro Parque Tenerife, SeaWorld San Diego
Little spotted cat (Leopardus tigrinus) - Prague Zoo
Malayan civet (Viverra tangalunga) - Berlin Tierpark
Mesic four-striped grass rat (Rhabdomys dilectus) - Prague Zoo
Nancy Ma's night monkey (Aotus nancymaae) - Faunia Madrid
Nile rat (Arvicanthis niloticus) - Plzen Zoo
Potto (Perodicticus potto) - Taipei Zoo
Pronghorn (Antilocapra americana) - San Diego Zoo
Sea otter (Enhydra lutris) - SeaWorld San Diego
Silvered leaf-monkey (Trachypithecus cristatus) - San Diego Zoo
Small desert jerboa (Jaculus jaculus) - Plzen Zoo
Speke's gazelle (Gazella spekei) - San Diego Zoo
Taiwan rock macaque (Macaca cyclopis) - Taipei Zoo
Tasmanian devil (Sarcophilus harrisii) - San Diego Zoo
Toque macaque (Macaca sinica) - Berlin Zoo-Aquarium
Tropical pilot whale (Globicephala macrorhynchus) - SeaWorld San Diego
Typical striped grass mouse (Lemniscomys striatus) - Prague Zoo
Walrus (Odobenus rosmarus) - Oceanografic Valencia, SeaWorld San Diego
Woodchuck (Marmota monax) - Prague Zoo
Yellow-footed squirrel (Paraxerus cepapi) - Prague zoo

BIRDS

Adelie penguin (Pygoscelis adeliae) - Faunia Madrid, SeaWorld San Diego
African darter (Anhinga rufa) - San Diego Zoo
African golden weaver (Ploceus subaureus) - Plzen Zoo
African grass owl (Tyto capensis) - Taipei Zoo
African three-banded plover (Charadrius tricollaris) - Plzen Zoo
American white pelican (Pelecanus erythrorhynchos) - Berlin Tierpark
Andean flamingo (Phoenicoparrus andinus) - Berlin Zoo-Aquarium
Asian pied starling (Sturnus contra) - Berlin Zoo-Aquarium
Aymara parakeet (Bolborhynchus aymara) - Loro Park Tenerife
Azure tit (Parus cyanus) - Plzen Zoo
Baglafecht weaver (Ploceus baglafecht) - Munich Zoo
Bar-shouldered dove (Geopelia humeralis) - Plzen Zoo
Bar-tailed cuckoo-dove (Macropygia unchall) - Prague Zoo
Bare-throated bellbird (Procnias nudicollis) - Barcelona Zoo
Barred buttonquail (Turnix suscitator) - Plzen Zoo
Barred dove (Geopelia maugei) - Plzen Zoo
Barred eagle-owl (Bubo sumatranus) - Berlin Tierpark
Barred laughingthrush (Garrulax lunulatus) - Prague Zoo
Baya weaver (Ploceus philippinus) - Taipei Zoo
Black eagle (Ictinaetus malayensis) - Taipei Zoo
Black oystercatcher (Haematopus bachmani) - Faunia Madrid
Black-and-red broadbill (Cymbirhynchus macrorhynchos) - Barcelona Zoo
Black-faced munia (Lonchura molucca) - Plzen Zoo
Black-faced spoonbill (Platalea minor) - Taipei Zoo
Black-headed bulbul (Pycnonotus atriceps) - Prague Zoo
Black-naped oriole (Oriolus chinensis) - Plzen Zoo
Black-spotted barbet (Capito niger) - San Diego Zoo
Black-winged lory (Eos cyanogenia) - San Diego Zoo
Black-winged lovebird (Agapornis taranta) - London Zoo, Loro Park Tenerife
Black-winged starling (Sturnus melanopterus) - Taipei Zoo, Berlin Zoo-Aquarium)
Blossom-headed parakeet (Psittacula roseata) - Loro Park Tenerife
Blue-bellied parrot (Triclaria malachitacea) - Loro Park Tenerife
Blue-bonnet (Psephotus haematogaster) - Loro Park Tenerife
Blue-breasted kingfisher (Halcyon malimbica) - Barcelona Zoo
Blue-chinned sapphire (Chlorostilbon notatus) - San Diego Zoo
Blue-crowned lory (Vini australis) - Loro Park Tenerife
Blue-headed wood dove (Turtur brehmeri) - Plzen Zoo
Blue-tailed imperial pigeon (Ducula concinna) - Prague Zoo
Blue-winged parakeet (Brotogeris cyanopterus) - Loro Park Tenerife
Blue-winged parrotlet (Forpus xanthopterygius) - Loro Park Tenerife
Blue-winged siva (Minla cyanouroptera) - San Diego Zoo
Blyth's tragopan (Tragopan blythii) - San Diego Zoo
Brown-breasted hill partridge (Arborophila brunneopectus) - Prague Zoo
Brown-headed parrot (Poicephalus cryptoxanthus) - Loro Park Tenerife
Brown-throated conure (Aratinga pertinax) - Loro Park Tenerife
Cactus conure (Aratinga cactorum) - Loro Park Tenerife
Canary-winged parakeet (Brotogeris versicolurus) - Loro Park Tenerife
Capuchinbird (Perissocephalus tricolor) - San Diego Zoo
Cardinal lory (Chalcopsitta cardinalis) - San Diego Zoo
Channel-billed cuckoo (Scythrops novaehollandiae) - Berlin Zoo-Aquarium
Chestnut-bellied hill partridge (Arborophila javanica) - San Diego Zoo
Chestnut-bellied sandgrouse (Pterocles exustus) - Plzen zoo
Chestnut-capped babbler (Timalia pileata) - Berlin Tierpark
Chinese hwamei (Garrulax canorus) - San Diego Zoo
Chinstrap penguin (Pygoscelis antarctica) - Faunia Madrid, Loro Park Tenerife
Coleto (Sarcops calvus) - Plzen Zoo, Prague Zoo
Collared finchbill (Spizixos semitorques) - San Diego Zoo
Collared imperial pigeon (Ducula mullerii) - San Diego Zoo
Collared lory (Phigys solitarius) - Loro Park Tenerife
Common flameback (Dinopium javanense) - Barcelona Zoo
Common house martin (Delichon urbica) - Plzen Zoo
Common koel (Eudynamys scolopacea) - Plzen Zoo
Coroneted fruit dove (Ptilinopus coronulatus) - Plzen Zoo, San Diego Zoo
Cream-striped bulbul (Pycnonotus leucogrammicus) - Plzen Zoo
Crested coua (Coua cristata) - San Diego Zoo
Crested serpent eagle (Spilornis cheela) - Taipei Zoo
Crimson-rumped toucanet (Aulacorhynchus haematopygus) - Barcelona Zoo
Curl-crested aracari (Pteroglossus beauharnaesii) - San Diego ZOo
Desert finch (Rhodopechys obsoleta) - Berlin Tierpark
Dollabird (Eurystomus orientalis) - San Diego Zoo
Double-eyed fig parrot (Opopsitta diophthalma) - Loro Park Tenerife
Dusky parrot (Pionus fuscus) - Loro Park Tenerife
Dusky-headed conure (Aratinga weddellii) - Loro Park Tenerife
Dwarf conure (Aratinga nana) - Loro Park Tenerife
Edward's fig parrot (Psittaculirostris edwardsii) - Prague Zoo
Emperor penguin (Aptenodytes forsteri) - SeaWorld San Diego
Fawn-breasted bowerbird (Chlamydera cerviniventris) - San Diego Zoo
Fire-tufted barbet (Psilopogon pyrolophus) - San Diego Zoo
Gang-gang cockatoo (Callocephalon fimbriatum) - Loro Park Tenerife
Golden-capped parakeet (Aratinga auricapilla) - Loro Park Tenerife
Golden-crested myna (Ampeliceps coronatus) - San Diego Zoo
Golden-headed quetzal (Pharomachrus auriceps) - Barcelona Zoo
Golden-winged parakeet (Brotogeris chrysopterus) - Loro Park Tenerife
Gray-headed parrotbill (Paradoxornis gularis) - Prague Zoo
Great black-backed gull (Larus marinus) - Loro Park Tenerife
Great blue heron (Ardea herodias) - San Diego Zoo
Great-billed parrot (Tanygnathus megalorhynchos) - Loro Park Tenerife
Greater yellow-naped woodpecker (Picus flavinucha) - Plzen Zoo, Prague Zoo
Green oropendola (Psarocolius viridis) - Faunia Madrid
Green parakeet (Aratinga holochlora) - Loro Park Tenerife
Green rosella (Platycercus caledonicus) - Loro Park Tenerife
Green-headed sunbird (Nectarinia verticalis) - Barcelona Zoo
Green-rumped parrotlet (Forpus passerinus) - Loro Park Tenerife
Grey-cheeked parakeet (Brotogeris pyrrhopterus) - Loro Park Tenerife
Guianan cock-of-the-rock (Rupicola rupicola) - San Diego Zoo
Guyana toucanet (Selenidera culik) - San Diego Zoo
Harpy eagle (Harpia harpyja) - Berlin Tierpark, San Diego Zoo
Hartlaub's duck (Pteronetta hartlaubii) - Berlin Tierpark
Helmeted friarbird (Philemon buceroides) - Prague Zoo
Himalayan snowcock (Tetraogallus himalayensis) - Berlin Tierpark
Hoffmann's conure (Pyrrhura hoffmanni) - Loro Park Tenerife
Hooded crane (Grus monacha) - Taipei Zoo
Horned lark (Eremophila alpestris) - Plzen Zoo
House bunting (Emberiza striolata) - Plzen Zoo
Indian pond heron (Ardeola grayii) - Berlin Tierpark
Indian pygmy goose (Nettapus coromandelianus) - Prague Zoo
Japanese Waxwing (Bombycilla japonica) - London Butterfly House
Jungle bush quail (Perdicula asiatica) - Plzen Zoo
Jungle myna (Acridotheres fuscus) - Taipei Zoo
Kagu (Rhynochetos jubatus) - Ménagerie du Jardin des Plantes Paris, Berlin Zoo-Aquarium, San Diego Zoo
Large fig parrot (Psittaculirostris desmarestii) - Loro Park Tenerife
Layard's parakeet (Psittacula calthorpae) - Loro Park Tenerife
Lear's macaw (Anodorhynchus leari) - Prague Zoo, Loro Park Tenerife
Lesser blue-eared glossy starling (Lamprotornis chloropterus) - Faunia Madrid
Lesser grey shrike (Lanius minor) - Barcelona Zoo
Long-tailed fiscal (Lanius cabanisi) - Plzen Zoo
Long-tailed hornbill (Berenicornis albocristatus) - Prague Zoo
Long-tailed rosefinch (Uragus sibiricus) - Plzen Zoo
Long-toed lapwing (Vanellus crassirostris) - Berlin Zoo-Aquarium
Long-wattled umbrellabird (Cephalopterus penduliger) - Barcelona Zoo
Macaroni penguin (Eudyptes chrysolophus) - SeaWorld San Diego
Madagascar black bulbul (Hypsipetes madagascariensis) - San Diego Zoo
Magpie shrike (Corvinella melanoleuca) - San Diego Zoo
Malabar parakeet (Psittacula columboides) - Loro Park Tenerife
Malayan peacock-pheasant (Polyplectron malacense) - Prague Zoo
Maroon-fronted parrot (Rhynchopsitta terrisi) - Loro Park Tenerife
Marsh tit (Parus palustris) - Plzen zoo
Metallic starling (Aplonis metallica) - San Diego Zoo
Micronesian kingfisher (Halcyon cinnamomina) - San Diego Zoo
Milky stork (Mycteria cinerea) - San Diego Zoo
Moluccan king parrot (Alisterus amboinensis) - Loro Park Tenerife
Mountain bamboo partridge (Bambusicola fytchii) - Berlin Tierpark, San Diego Zoo
Musk lorikeet (Glossopsitta concinna) - Loro Park Tenerife
Northern rosella (Platycercus venustus) - Loro Park Tenerife
Northern white-crowned shrike (Europcephalus rueppelli) - San Diego Zoo
Olive-shouldered parrot (Aprosmictus jonquillaceus) - Loro Park Tenerife
Orange-bellied leafbird (Chloropsis hardwickii) - London Butterfly House
Orange-fronted fruit dove (Ptilinopus aurantiifrons) - Plzen Zoo
Orange-fronted parakeet (Aratinga canicularis) - Loro Park Tenerife
Oriental greenfinch (Carduelis sinica) - Berlin Zoo-Aquarium, Plzen Zoo
Oriole warbler (Hypergerus atriceps) - San Diego ZOo
Ornate hawk-eagle (Spizaetus ornatus) - San Diego Zoo
Ornate lorikeet (Trichoglossus ornatus) - Loro Park Tenerife
Ouvea parakeet (Eunymphicus uvaeensis) - Loro Park Tenerife
Painted firetail (Emblema picta) - Plzen Zoo
Papuan mountain pigeon (Gymnophaps albertisii) - San Diego Zoo
Peruvian pelican (Pelecanus thagus) - Berlin Tierpark
Pesquet's parrot (Psittrichas fulgidus) - Loro Park Tenerife
Philby's partridge (Alectoris philbyi) - Berlin Tierpark
Philippine cuckoo-dove (Macropygia tenuirostris) - Plzen Zoo
Pied heron (Egretta picata) - Berlin Zoo-Aquarium
Pileated parrot (Pionopsitta pileata) - Loro Park Tenerife
Pink-breasted dove (Streptopelia lugens) - Plzen Zoo
Pink-eared duck (Malacorhynchus membranaceus) - Prague Zoo
Piping hornbill (Bycanistes fistulator) - Plzen Zoo
Plain parakeet (Brotogeris tirica) - Loro Park Tenerife
Plate-billed mountain toucan (Andigena laminirostris) - San Diego Zoo
Puna flamingo (Phoenicoparrus jamesi) - Berlin Zoo-Aquarium
Purple-bellied lory (Lorius hypoinochrous) - Loro Park Tenerife
Purple-tailed imperial pigeon (Ducula rufigaster) - San Diego Zoo
Purple-throated fruitcrow (Querula purpurata) - Berlin Zoo-Aquarium
Raggiana bird of paradise (Paradisaea raggiana) - San Diego Zoo
Red and Blue Lory (Eos histrio) - Loro Park Tenerife
Red bird of paradise (Paradisaea rubra) - Taipei Zoo
Red shining parrot (Prosopeia tabuensis) - Loro Park Tenerife
Red-collared widowbird (Euplectes ardens) - London Butterfly House
Red-fronted laughingthrush (Garrulax rufifrons) - Plzen Zoo
Red-headed vulture (Sarcogyps calvus) - Ménagerie du Jardin des Plantes Paris, Berlin Tierpark
Red-spectacled amazon (Amazona pretrei) - Loro Park Tenerife
Rose-crowned fruit dove (Ptilinopus regina) - Plzen Zoo
Ruby-topaz (Chrysolampis mosquitus) - Berlin Tierpark
Rufous-capped babbler (Stachyris ruficeps) - Berlin Tierpark
Rufous-cheeked laughingthrush (Garrulax castanotis) - Prague Zoo
Rufous-crowned roller (Coracias naevia) - Berlin Zoo-Aquarium
Rusty laughingthrush (Garrulax poecilorhynchus) - Taipei Zoo
Saint Vincent amazon (Amazona viridigenalis) - Loro Park Tenerife
Scaly laughingthrush (Garrulax subunicolor) - Plzen Zoo
Scaly-breasted bulbul (Pycnonotus squamatus) - Plzen Zoo
Scarlet-rumped cacique (Cacicus uropygialis) - Berlin Zoo-Aquarium
Shoebill (Balaeniceps rex) - Prague zoo
Silver-eared laughingthrush (Garrulax melanostigma) - Prague Zoo
Slaty-headed parakeet (Psittacula himalayana) - Loro Park Tenerife
Slender-billed conure (Enicognathus leptorhynchus) - Loro Park Tenerife
Sociable weaver (Philetairus socius) - San Diego ZOo
Southern yellow-billed hornbill (Tockus leucomelas) - Berlin Tierpark
Spot-bellied eagle-owl (Bubo nipalensis) - Ménagerie du Jardin des Plantes Paris, Berlin Tierpark
Spotted imperial pigeon (Ducula carola) - Plzen Zoo
Spotted tanager (Tangara punctata) - San Diego Zoo
Stone partridge (Ptilopachus petrosus) - San Diego Zoo
Sulawesi knobbed hornbill (Aceros cassidix) - SeaWorld San Diego
Sulawesi tarictic hornbill (Penelopides exarhatus) - San Diego Zoo
Sumatran treepie (Dendrocitta occipitalis) - Plzen Zoo
Sunda parrotfinch (Erythrura tricolor) - Plzen Zoo
Superb bird of paradise (Lophorina superba) - San Diego Zoo
Taiwan blue magpie (Urocissa caerulea) - Taipei Zoo
Thick-billed parrot (Rhynchopsitta pachyrhyncha) - Loro Park Tenerife
Timor sparrow (Padda fuscata) - Plzen Zoo
Tongan scrubfowl (Megapodius pritchardii) - San Diego Zoo
Tropical kingbird (Tyrannus melancholicus) - Berlin Tierpark
Tufted puffin (Fratercula cirrhata) - SeaWorld San Diego
Tui parakeet (Brotogeris sanctithomae) - Loro Park Tenerife
Two-barred crossbill (Loxia leucoptera) - Plzen Zoo
Vernal hanging parrot (Loriculus vernalis) - Prague Zoo
Vitelline masked weaver (Ploceus vitellinus) - Munich Zoo
White Woodpecker (Melanerpes candidus) - Barcelona Zoo
White-bellied bustard (Eupodotis senegalensis) - Berlin Zoo-Aquarium
White-breasted woodswallow (Artamus leucorhynchus) - San Diego Zoo
White-eared catbird (Ailuroedus buccoides) - Berlin Tierpark
White-headed lapwing (Vanellus albiceps) - San Diego Zoo
White-headed parrot (Pionus seniloides) - Loro Park Tenerife
White-necked jacobin (Florisuga mellivora) - San Diego Zoo
White-throated ground dove (Gallicolumba xanthonura) - San Diego Zoo
White-winged redstart (Phoenicurus erythrogaster) - Plzen Zoo
Wompoo fruit dove (Ptilinopus magnificus) - San Diego Zoo
Yellow and green lorikeet (Trichoglossus flavoviridis) - Loro Park Tenerife
Yellow-tailed black cockatoo (Calyptorhynchus funereus) - Loro Park Tenerife
Zoe's imperial pigeon (Ducula zoeae) - London Zoo

REPTILES

African five-lined skink (Trachylepis quinquetaeniata) - Berlin Tierpark
Baja California rat snake (Elaphe rosaliae) - San Diego Zoo
Biak tree monitor (Varanus kordensis) - Prague Terrarium
Black-headed python (Aspidites melanocephalus) - San Diego Zoo
Blue rainbow lizard (Agama lionotus) - Prague Zoo
Boehme's monitor (Varanus boehmei) - Plzen Zoo
Boelen's python (Morelia boeleni) - San Diego Zoo
Borneo skink (Dasia vittata) - Berlin Tierpark
Brazilian lancehead (Bothrops moojeni) - Prague Terrarium
Catalina Island rattlesnake (Crotalus catalinensis) - San Diego Zoo
Chaco lancehead (Bothrops diporus) - Nantes natural history museum
Coffee palm viper (Bothriechis lateralis) - San Diego Zoo
East African egg-eating snake (Dasypeltis medici) - Prague Zoo
Ethiopian mountain adder (Bitis parviocula) - San Diego Zoo
Giant horned lizard (Phrynosoma asio) - Plzen Zoo, San Diego Zoo
Granite night lizard (Xantusia henshawi) - San Diego natural history museum
Gray's monitor (Varanus olivaceus) - San Diego Zoo
Indian narrow-headed soft-shelled turtle (Chitra indica) - San Diego Zoo
Jerdon's pitviper (Protobothrops jerdoni) - San Diego Zoo
Karsten's girdled lizard (Zonosaurus karsteni) - Plzen Zoo
Lataste's lizard (Lacerta pater) - Prague zoo
Long-nosed snake (Rhinocheilus lecontei) - San Diego Natural History Museum
Mang Mountain pitviper (Protobothrops mangshanensis) - San Diego Zoo
Mexican lance-headed rattlesnake (Crotalus polystictus) - San Diego Zoo
Mugger crocodile (Crocodylus palustris) - Barcelona Zoo
New Guinea crocodile (Crocodylus novaeguineae) - Berlin Zoo-Aquarium
Northern forest dragon (Hypsilurus godeffroyi) - Plzen Zoo
Ornate mastigure (Uromastyx ornata) - Prague Terrarium
Pacific pond turtle (Clemmys marmorata) - San Diego Zoo
Papua snake lizard (Lialis jicari) - Munich Zoo
Parker's snake-necked turtle (Chelodina parkeri) - Faunia Madrid
Peach-throated monitor (Varanus jobiensis) - Prague Terrarium
Rainbow skink (Trachylepis margaritifera) - Plzen Zoo, Prague Zoo
Red-headed amazon side-necked turtle (Podocnemis erythrocephala) - San Diego Zoo
Rhinoceros snake (Gonyosoma boulengeri) - Prague Zoo
Ring-necked spitting cobra (Hemachatus haemachatus) - San Diego Zoo
Rufous beaked snake (Rhamphiophis rostratus) - Prague Zoo
Satanic leaf-tailed gecko (Uroplatus phantasticus) - San Diego Zoo
South African bowsprit tortoise (Chersina angulata) - Berlin Tierpark
Southeastern girdled lizard (Zonosaurus maximus) - Plzen Zoo
Southern alligator lizard (Elgaria multicarinata) - San Diego natural history museum
Southern river terrapin (Batagur affinis) - Prague Zoo
Two-striped garter snake (Thamnophis hammondii) - San Diego Zoo
Vaillant's mabuya (Chioninia vaillantii) - Plzen Zoo, Prague Zoo
Woma (Aspidites ramsayi) - Berlin Zoo-Aquarium

AMPHIBIANS

Baja California chorus frog (Hyla hypochondriaca) - San Diego natural history museum
Bangkimsting frog (Rana swinhoana) - Taipei Zoo
Bumblebee toad (Melanophryniscus stelzneri) - Berlin Zoo-Aquarium
Karoo toad (Bufo gariepensis) - Prague Zoo
Pacific chorus frog (Hyla regilla) - San Diego natural history museum
Western spadefoot toad (Spea hammondii) - San Diego natural history museum

BONY FISHES

Atlantic stargazer (Uranoscopus scaber) - Barcelona Aquarium
Australian spotted gudgeon (Mogurnda mogurdna) - Zaragoza Fluvial Aquarium
Barred sand bass (Paralabrax nebulifer) - Birch Aquarium
Bay pipefish (Syngnathus leptorhynchus) - Birch Aquarium
Black bullhead (Ameiurus melas) - Zaragoza Fluvial Aquarium
Black perch (Embiotoca jacksoni) - Seaworld San Diego
Blackcap basslet (Gramma melacara) - Berlin Zoo-Aquarium
Blackeye goby (Coryphopterus nicholsii) - Birch Aquarium
Blacknosed butterflyfish (Johnrandallia nigrirostris) - SeaWorld San Diego
Blacksmith chromis (Chromis punctipinnis) - Birch Aquarium
Blue and gold snapper (Lutjanus viridis) - Birch Aquarium
Blue parrotfish (Scarus coeruleus) - Berlin Zoo-Aquarium
Blue rockfish (Sebastes mystinus) - SeaWorld San Diego, Birch Aquarium
Blue-barred parrotfish (Scarus ghobban) - Birch Aquarium
Blue-spotted jawfish (Opisthognathus rosenblatti) - Birch Aquarium
Bluegill (Lepomis macrochirus) - San Diego natural history museum
Bluehead (Thalassoma bifasciatum) - Aquarium du La Rochelle
Bluestriped angelfish (Chaetodontoplus septentrionalis) - Berlin Zoo-Aquarium
Bocaccio (Sebastes paucispinis) - Birch Aquarium
Brown moray (Gymnothorax unicolor) - Loro Park Tenerife
Brown-lined triggerfish (Xanthichthys lineopunctatus) - Aquarium du La Rochelle
Bucktooth tetra (Exodon paradoxus) - SeaWorld San Diego
Buffalo trunkfish (Lactophrys trigonus) - Aquarium du La Rochelle
Bumblebee cichlid (Pseudotropheus crabro) - Faunia Madrid
C-O sole (Pleuronichthys coenosus) - SeaWorld San Diego, Birch Aquarium
Calico rockfish (Sebastes dallii) - Birch Aquarium
California golden trout (Oncorhynchus aguabonita) - SeaWorld San Diego
California halibut (Paralichthys californicus) - Birch Aquarium
California moray (Gymnothorax mordax) - Birch Aquarium
California sheephead (Semicossyphus pulcher) - SeaWorld San Diego, Birch Aquarium
Californian salema (Xenistius californiensis) - Birch Aquarium
Catalina goby (Lythrypnus dalli) - Birch Aquarium
Checkered puffer (Sphoeroides testudineus) - Madrid Zoo-Aquarium
China rockfish (Sebastes nebulosus) - Birch Aquarium
Chinamanfish (Symphorus nematophorus) - Faunia Madrid
Clipperton's grouper (Epinephelus clippertonensis) - Birch Aquarium
Cloudy damselfish (Dascyllus carneus) - Prague Aquarium
Clown grouper (Pogonoperca punctata) - Faunia Madrid
Common dolphinfish (Coryphaena hippurus) - Oceanografic Valencia
Conde's armored catfish (Apistoloricaria condei) - Berlin Zoo-Aquarium
Coral hawkfish (Cirrhitichthys oxycephalus) - Madrid Zoo-Aquarium, Birch Aquarium
Cortez angelfish (Pomacanthus zonipectus) - Aquarium du La Rochelle
Cortez rainbow wrasse (Thalassoma lucasanum) - Birch Aquarium
Criss-cross butterflyfish (Chaetodon vagabundus) - Berlin Zoo-Aquarium
Dark-banded fusilier (Pterocaesio tile) - SeaWorld San Diego
Decorated warbonnet (Chirolophis decoratus) - Birch Aquarium
Dotted moray (Muraena augusti) - Loro Park Tenerife
Double-lined fusilier (Pterocaesio digramma) - SeaWorld San Diego
Dwarf seahorse (Hippocampus zosterae) - Birch Aquarium
Ebro barbel (Barbus graellsii) - Zaragoza Fluvial Aquarium
Ebro nase (Chondrostoma miegii) - Zaragoza Fluvial Aquarium
Filament-finned prawn-goby (Stonogobiops nematodes) - Berlin Zoo-Aquarium
Flag rockfish (Sebastes rubrivinctus) - Birch Aquarium
Freshwater blenny (Salaria fluviatilis) - Zaragoza Fluvial Aquarium
Freshwater garfish (Xenentodon cancila) - Berlin Zoo-Aquarium
Geoffroy's wrasse (Macropharyngodon geoffroy) - Birch Aquarium
Giant damselfish (Microspathodon dorsalis) - Birch Aquarium
Giant kelpfish (Heterostichus rostratus) - Birch Aquarium
Giant sea bass (Stereolepis gigas) - Birch Aquarium
Giant sweetlips (Plectorhinchus albovittatus) - Aquarium du La Rochelle
Golden mylossoma (Mylossoma aureum) - SeaWorld San Diego
Goldspotted angelfish (Apolemichthys xanthopunctatus) - Aquarium du La Rochelle
Green sunfish (Lepomis cyanellus) - San Diego natural history museum
Grey grunt (Haemulon scudderi) - Birch Aquarium
Greybar grunt (Haemulon sexfasciatum) - Birch Aquarium
Grunt sculpin (Rhamphocottus richardsonii) - Birch Aquarium
Guadalupe cardinalfish (Apogon guadalupensis) - Birch Aquarium
Hairfin lookdown (Selene brevoortii) - Birch Aquarium
Halfmoon (Medialuna californiensis) - SeaWorld San Diego, Birch Aquarium
Harlequin hind (Cephalopholis polleni) - Berlin Zoo-Aquarium
Hawkfish anthis (Serranocirrhitus latus) - Birch Aquarium
Head-and-tail light tetra (Hemigrammus ocellifer) - SeaWorld San Diego
Honeycomb cowfish (Acanthostracion polygonius) - Berlin Zoo-Aquarium
Indian triggerfish (Melichthys indicus) - SeaWorld San Diego
Indopacific tarpon (Megalops cyprinoides) - Zaragoza Fluvial Aquarium
Island kelpfish (Alloclinus holderi) - Birch Aquarium
Japanese rice fish (Oryzias latipes) - Zaragoza Fluvial Aquarium
Jewel moray (Muraena lentiginosa) - Birch Aquarium
Kafue pike (Hepsetus odoe) - Berlin Zoo-Aquarium
Kelp bass (Paralabrax clathratus) - Birch Aquarium
La Palma pupfish (Cyprinodon longidorsalis) - London Zoo
Largescaled terapon (Terapon theraps) - Zaragoza Fluvial Aquarium
Lavender sculpin (Leiocottus hirundo) - Birch Aquarium
Leopard cory (Corydoras leopardus) - Berlin Zoo-Aquarium
Leopard flounder (Bothus pantherinus) - Aquarium du La Rochelle
Longfin yellowtail (Seriola rivoliana) - Birch Aquarium
Longnose puffer (Sphoeroides lobatus) - Birch Aquarium
Longnose surgeonfish (Zebrasoma rostratum) - Aquarium du La Rochelle
Longsnout distichodus (Distichodus lusosso) - Loro Park Tenerife
Many-banded pipefish (Doryrhamphus multiannulatus) - Aquarium du La Rochelle, Birch Aquarium
Marbled headstander (Abramites hypselonotus) - Berlin Zoo-Aquarium
Margined coralfish (Chelmon marginalis) - Berlin Zoo-Aquarium
Masked bannerfish (Heniochus monoceros) - Berlin Zoo-Aquarium
Messmate pipefish (Corythoichthys haematopterus) - Birch Aquarium
Mexican hogfish (Bodianus diplotaenia) - Birch Aquarium
Mosaic leatherjacket (Eubalichthys mosaicus) - Berlin Zoo-Aquarium
Multicolor angelfish (Centropyge multicolor) - Berlin Zoo-Aquarium
Mushroom scorpionfish (Scorpaena inermis) - Madrid Zoo-Aquarium
Ncheni cichlid (Dimidiochromis dimidiatus) - Faunia Madrid
New Holland seahorse (Hippocampus whitei) - Birch Aquarium
Nkamba's cichlid (Lepidiolamprologus nkambae) - Loro Park Tenerife
Ocean sunfish (Mola mola) - Oceanografic Valencia, Aquarium Barcelona
Old glory (Amblygobius rainfordi) - Berlin Zoo-Aquarium
Olive rockfish (Sebastes serranoides) - Birch Aquarium
Opaleye (Girella nigricans) - SeaWorld San Diego, Birch Aquarium
Orange filefish (Aluterus schoepfii) - Berlin Zoo-Aquarium
Orangeside triggerfish (Sufflamen verres) - Birch Aquarium
Orangethroat pikeblenny (Chaenopsis alepidota) - Birch Aquarium
Orbiculate cardinalfish (Sphaeramia orbicularis) - Prague Aquarium
Ornamented wrasse (Halichoeres ornatissimus) - Birch Aquarium
Pacific chub mackerel (Scomber japonicus) - Birch Aquarium
Pacific creole-fish (Paranthias colonus) - Birch Aquarium
Pacific mutton hamlet (Alphestes immaculatus) - Birch Aquarium
Pacific seahorse (Hippocampus ingens) - Birch Aquarium
Pacific spadefish (Chaetodipterus zonatus) - Birch Aquarium
Painted frogfish (Antennarius pictus) - Faunia Madrid
Painted greenling (Oxylebius pictus) - Birch Aquarium
Palometa (Trachinotus goodei) - Aquarium du La Rochelle
Panamic soldierfish (Myripristis leiognathus) - Birch Aquarium
Payara (Hydrolycus scomberoides) - Faunia Madrid
Pearly razorfish (Xyrichthys novacula) - Aquarium du La Rochelle
Pebbled butterflyfish (Chaetodon multicinctus) - SeaWorld San Diego
Portuguese blenny (Parablennius ruber) - Aquarium du La Rochelle
Princess parrotfish (Scarus taeniopterus) - Aquarium du La Rochelle
Queensland yellowtail angelfish (Chaetodontoplus meredithi) - Berlin Zoo-Aquarium
Rainbow characin (Rhoadsia altipinna) - Berlin Zoo-Aquarium
Rainbow scorpionfish (Scorpaenodes xyris) - Birch Aquarium
Rainbow seaperch (Hypsurus caryi) - Birch Aquarium
Rainford's butterflyfish (Chaetodon rainfordi) - SeaWorld San Diego
Red drum (Sciaenops ocellatus) - Barcelona Aquarium
Red irish lord (Hemilepidotus hemilepidotus) - Birch Aquarium
Red spotted cichlid (Paratheraps bifasciatus) - Loro Park Tenerife
Redband rockfish (Sebastes babcocki) - SeaWorld San Diego
Ribboned pipefish (Haliichthys taeniophorus) - Birch Aquarium
Rock wrasse (Halichoeres semicinctus) - Birch Aquarium
Rosy rockfish (Sebastes rosaceus) - SeaWorld San Diego
Royal twig catfish (Sturisoma panamense) - Berlin Zoo-Aquarium
Russet angelfish (Centropyge potteri) - Birch Aquarium
Saddle wrasse (Thalassoma duperrey) - Aquarium du La Rochelle
Sailfin marbled catfish (Leiarius pictus) - Munich Zoo
Sammara squirrelfish (Neoniphon sammara) - Birch Aquarium
Sarcastic fringehead (Neoclinus blanchardi) - Birch Aquarium
Scissortail damselfish (Chromis atrilobata) - Birch Aquarium
Scribbled angelfish (Chaetodontoplus duboulayi) - Berlin Zoo-Aquarium
Scythe butterflyfish (Prognathodes falcifer) - Birch Aquarium
Señorita wrasse (Oxyjulis californica) - Birch Aquarium
Seychelles butterflyfish (Chaetodon madagaskariensis) - Berlin Zoo-Aquarium
Shiner perch (Cymatogaster aggregata) - Birch Aquarium
Short dragonfish (Eurypegasus draconis) - Birch Aquarium
Shortnose gar (Lepisosteus platostomus) - Munich Zoo
Shovelnose twig catfish (Farlowella platorynchus) - Berlin Zoo-Aquarium
Skunk loach (Botia morleti) - SeaWorld San Diego
Slippery dick (Halichoeres bivittatus) - Aquarium du La Rochelle
Snowy grouper (Hyporthodus niphobles) - Birch Aquarium
South American pilchard (Sardinops sagax) - Birch Aquarium
Southseas devil (Chrysiptera taupou) - London Zoo
Sphinx blenny (Aidablennius sphynx) - Barcelona Aquarium
Splitfin flashlightfish (Anomalops katoptron) - Berlin Zoo-Aquarium
Spotfin croaker (Roncador stearnsii) - Birch Aquarium
Spottail grunt (Haemulon maculicauda) - Birch Aquarium
Spotted drum (Equetus punctatus) - Berlin Zoo-Aquarium
Spotted seabass (Dicentrarchus punctatus) - Barcelona Aquarium
Starry flounder (Platichthys stellatus) - Birch Aquarium
Stone triggerfish (Pseudobalistes naufragium) - Birch Aquarium
Striped pike-characin (Boulengerella lateristriga) - Berlin Zoo-Aquarium
Striped poison-fang blenny (Meiacanthus grammistes) - Berlin Zoo-Aquarium
Striped seaperch (Embiotoca lateralis) - SeaWorld San Diego
Sunset anthias (Pseudanthias parvirostris) - Berlin Zoo-Aquarium
Sunshine pleco (Scobinancistrus aureatus) - Berlin Zoo-Aquarium
Surge wrasse (Thalassoma purpureum) - Prague Aquarium
Threadfin acara (Acarichthys heckelii) - Munich Zoo
Three-banded butterflyfish (Chaetodon humeralis) - Birch Aquarium
Tiger loach (Botia hymenophysa) - Zaragoza Fluvial Aquarium
Tiger rockfish (Sebastes nugrocinctus) - Birch Aquarium
Tomato hind (Cephalopholis sonnerati) - Prague Aquarium
Topsmelt silverside (Atherinops affinis) - Birch Aquarium
Unicorn leatherjacket (Aluterus monoceros) - Berlin Zoo-Aquarium
Vanderbilt's chromis (Chromis vanderbilti) - Birch Aquarium
Vermiculated angelfish (Chaetodontoplus mesoleucus) - Aquarium du La Rochelle
Vermilion rockfish (sebastes miniaTUS) - Birch Aquarium
Violet goby (Gobioides broussonetii) - Faunia Madrid
West Australian seahorse (Hippocampus subelongatus) - Berlin Zoo-Aquarium
White seaperch (Phanerodon furcatus) - Birch Aquarium
Whitebarred wrasse (Pseudocheilinus ocellatus) - Berlin Zoo-Aquarium
Whitefin surgeonfish (Acanthurus albipectoralis) - Birch Aquarium
Wolf characin (Cynodon gibbus) - Berlin Zoo-Aquarium
Xantic sargo (Anisotremus davidsonii) - Birch Aquarium
Yellowfin croaker (Umbrina roncador) - Birch Aquarium
Yellowhead wrasse (Halichoeres garnoti) - Berlin Zoo-Aquarium
Yellowtail surgeonfish (Prionurus punctatus) - SeaWorld San Diego
Zebra angelfish (Genicanthus caudovittatus) - Berlin Zoo-Aquarium
Zebra catalina goby (Lythrypnus zebra) - Birch Aquarium
Zebra-perch sea chub (Kyphosus azureus) - Birch Aquarium

CARTILAGINOUS FISHES

Banded guitarfish (Zapteryx exasperata) - Birch Aquarium
Banded houndshark (Triakis scyllia) - Prague Aquarium
Bat eagle ray (Myliobatis californica) - SeaWorld San Diego
California butterfly ray (Gymnura marmorata) - Birch Aquarium
Gray smooth-hound (Mustelus californicus) - SeaWorld San Diego
Haller's round ray (Urobatis halleri) - SeaWorld San Diego, Birch Aquarium
Japanese wobbegong (Orectolobus japonicus) - Prague Aquarium
Mediterranean starry ray (Raja asterias) - Barcelona Aquarium
Pacific angelshark (Squatina californica) - Birch Aquarium
Pointed-nosed guitarfish (Rhinobatos productus) - SeaWorld San Diego, Birch Aquarium
Spotted round ray (Urolophus maculatus) - Prague Aquarium
Vermiculate river stingray (Potamotrygon castexi) - Prague Zoo
Whiptail stingray (Dasyatis brevis) - Birch Aquarium
 
Regarding rare species - Bristol has some rare invertebrates to add to the list for visitors:

Partula snails - several species (mostly extinct in the wild)
Desertas Wolf Spider (only ones in captivity)
Lord Howe Stick Insect (only breeding adults outside Australia)

There are of course a lot of vertebrate taxa as well, but I though the invertebrates should get a mention as well...
 
A lot of these Iv'e grown up around so I didn't realize how rare they are until recently.

Perentie (Dallas Zoo)
Northern White Rhino (San Diego Safari Park)
Tuatara (Dallas Zoo)
Gharial (Fort Worth Zoo)
California Condor (San Diego Zoo)
Tree Pangolin (San Diego Zoo)
Tasmanian Devil (San Diego Zoo)
Aye Aye (San Diego, Omaha, Cincinnati Zoo)
Sumatran Rhino (Cincinnati Zoo)
Giant Panda (San Diego, National, Memphis, Atlanta Zoo)
Yapok (Dallas World Aquarium)
Ornate Hawk Eagle (Dallas World Aquarium)
Jabiru Stork (Dallas World Aquarium)
Black Hawk Eagle (Dallas World Aquarium)
Black and White Hawk Eagle (Dallas World Aquarium)
Guiana Crested Eagle (Dallas World Aquarium)
Orinoco Crocodile (Dallas World Aquarium, San Antonio Zoo)
Morelete's Crocodile (Dallas World Aquarium)
Mugger Crocodile (Newport Aquarium)
Cuban Crocodile (National Zoo
Chinese Giant Salamander (Fort Worth Zoo)
Japanese Giant Salamander (San Antonio Zoo, Omaha Zoo)
Philippines Crocodile (Omaha Zoo)
Siamese Crocodile (Snake Farm and Animal World Zoo)
Potto (Omaha Zoo)
Whale Shark (Georgia Aquarium)
Manta Ray (Georgia Aquarium)
Scalloped Hammerhead (Mandalay Bay Aquarium)
Galapagos Shark (Mandalay Bay Aquarium)
Bull Shark (Oklahoma Aquarium)
Common Dolphin (Sea World San Diego)
Pilot Whale (Sea World San Diego)
Orca (Sea World San Diego and San Antonio)
Pacific White Sided Dolphin (Sea World San Antonio)
Hawaiian Monk Seal (Sea World San Antonio)
Hawaiian Hawk (Houston Zoo)
St. Vincent's Amazon (Houston Zoo)
Guam King Fisher (San Antonio Zoo)
Guam Rail (San Antonio Zoo)
Aardwolf (Cincinnati Zoo)
Attwatter's Prairie Chicken (Abilene, Tyler Zoo and Fossil Rim)
Flapjack Octopus (Monterrey Bay Aquarium)
Asiatic Lion (Audubon Zoo)
Drill (Audubon Zoo)
Rodrigues Flying Fox (Moody Gardens, San Diego Safari Park)
Socorro Dove (Albuquerque Zoo)
Tasmanian Wombat (Albuquerque Zoo)
Brown Throated Three Toed Sloth (Dallas World Aquarium)
Antillean Manatee (Dallas World Aquarium)
 
My list:
Leopard Seal (Taronga Zoo)

Platypus (Melbourne Zoo, Taronga Zoo, David Fleay Wildlife Park)

Proserpine Rock Wallaby (David Fleay Wildlife Park)

Dugong (Sydney Aquauriam)

African Forest Buffalo (Dubbo Open Range Zoo)

Brideled Nailtail Wallaby (David Fleay Wildlife Park)

South American Coati (Melbourne Zoo)

Chinese Giant Salamander (River Safari Singapore)

Giant Panda (River Safari Singapore)

Jaguarundi (River Safari Singapore)

Southern Ground Hornbill (Jurong Bird Park)

Proboscis Monkey (Singapore Zoo)
 
Though not my entire list, I just today saw the last red-shanked douc langur (I'd seen her before but didn't remember her) in America, at the Philadelphia Zoo. I also saw Ivory-billed aracari, something I missed several times at the Dallas World Aquarium, and it is a rather uncommon species.
 
animal_expert01 said:
My list:
Leopard Seal (Taronga Zoo)

Platypus (Melbourne Zoo, Taronga Zoo, David Fleay Wildlife Park)

Proserpine Rock Wallaby (David Fleay Wildlife Park)

Dugong (Sydney Aquauriam)

African Forest Buffalo (Dubbo Open Range Zoo)

Brideled Nailtail Wallaby (David Fleay Wildlife Park)

South American Coati (Melbourne Zoo)

Chinese Giant Salamander (River Safari Singapore)

Giant Panda (River Safari Singapore)

Jaguarundi (River Safari Singapore)

Southern Ground Hornbill (Jurong Bird Park)

Proboscis Monkey (Singapore Zoo)
Click to expand...

Persian Onager (Dubbo Zoo)

Przewalski's Wild Horse (Dubbo Zoo)

Indian Rhino (Dubbo Zoo)

Banteng (Dubbo Zoo)

Gahrial (Singapore Zoo)

Naked Mole Rats (Singapore Zoo)

Pangalion (Unknown Species) (Singapore Night Safari)

Greater Bilby (David Fleay Wildlife Park)

African Elephant (Dubbo Zoo)
 
Orinoco Crocodile (Brookfield Zoo)
Red-Faced Spider Monkey (Brookfield Zoo)
Forest Buffalo (Brookfield Zoo)
Sichuan Takin (Lincoln Park Zoo)
Asiatic Black Bear (Milwaukee County Zoo) -- been quite a while
Kikanjou (Milwaukee County Zoo)
Tayra? (Milwaukee County Zoo) -- don't really remember seeing it too well, but I know I've seen it
Beluga (Shedd Aquarium)
Gharial (National Zoo)
Giant Panda (National Zoo)

I'm probably missing some species, but those are the first ones off my head that really seemed unique. There are a few that seemed unique at the time but have since become common as well, like Red pandas, or are unique in my area but not so much nationally or worldwide.
 
I saw the kagu at the San Diego Zoo. Also saw the great blue turaco, which seems to be pretty rare in zoos. Saw kiwis a long time ago at the National Zoo.
I saw vampire bats at the Bronx Zoo back in the long ago, and bonobos at the San Diego Zoo. And of course I saw the giant pandas at the National Zoo.
And while I'm not sure how rare seamoths are, I never heard of them before I went to the Scripps Aquarium (and they're so striking I could not forget them) so I suspect they're still rare in captivity.
 
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