- #1 - African rainforest bird or mammal which could cohabitate with Yellow-backed Duiker, Western Plantain-eater, Blue-naped Mousebird, and Superb Starling
African brush-tailed porcupine, white-throated bee-eater, go-away bird
- #2 - African rainforest bird which could cohabitate with Black Crake, Purple-crested Turaco, and Red-and-Yellow Barbet
African pygmy goose, hamerkop, hadada ibis, tambourine dove, snowy-crowned robin-chat, most kingfishers (rare)
- #3 - African rainforest bird or mammal which could cohabitate with Black-and-Rufous Sengi
African dormice, cordon-bleu, emerald starlings
- #4 - African rainforest bird or mammal which could cohabitate with Bearded Barbet, Blue-bellied Roller, Red-crested Turaco, and Okapi
Congo Peafowl, great blue turaco, tinkerbirds
- #5 - African savanna bird or mammal which could cohabitate with Northern Carmine Bee-eater and Vulturine Guineafowl
Kirk's dik-dik, spotted dikkop, speckled mousebird
- #6 - Mediterranean shorebird which could cohabitate with Greater Flamingo and Eurasian Oystercatcher
Pied avocet, marbled teal, black-winged stilt
- #7 - European/West Asian bird or mammal which is walkthrough-friendly and could mix with Western Capercaillie, European Green Woodpecker, Eurasian Bullfinch, Marginated Tortoise, European Goldfinch, and European Collared Dove
Eurasian Jay, European hoopoe
- #8 - Indian bird which could cohabitate with Indian Peafowl, Nicobar Pigeon, and Indian Star Tortoise
Red junglefowl, Indian rose-ringed parakeet, zebra dove
- #9 - walkthrough-friendly Southeast Asian bird/mammal compatible with Maleo, Chestnut-naped Imperial Pigeon, and Asian Fairy Bluebird
Crested wood partridge, green junglefowl
- #10 - smaller Southeast Asian bird which could be housed with Komodo Dragon (well aware of the risks)
Red adavat, scaly-breasted munia, oriental magpie robin, oriental white-eye, java finch, zebra finch
- #11 - Southeast Asian bird able to mix with Luzon Bleeding-heart and Bali Myna
Emerald dove, Asian glossy starling, Palawan peacock-pheasant
- #12 - larger New Guinea-native mammals/herptiles
Matschie's tree kangaroo, dusky pademelon, short-beaked echidna, new guinea ground cuscus, boelen's python, pig-nosed turtle
- #13 - fourth macropod to live alongside Brush-tailed Rock-wallaby, Emu, Swamp and Parma Wallabies
Tammar wallaby
- #14 - smaller African primate which could live with any of the following: Mantled Guereza, Western Lowland Gorilla, Golden-bellied Mangabey, Congo Wolf's Guenon, Lesser Spot-nosed Guenon
DeBrazza's monkey, allen's swamp monkey, blue monkey
- #15 - African turtle which could live with Slender-snouted Crocodile and African Helmeted Turtle
Pelusios sp. like west African mud turtle
- #16 - any African rainforest, Eurasian, Southeast Asian, or Oceanian terrarium species (reptile, amphibian, invertebrate)
African rainforest: Look at Bronx Zoo's Congo rainforest animals, gaboon viper
Eurasian: Fire salamander, Armenian viper, European glass lizard, Mediterranean house gecko, Italian wall lizard, jeweled Lacerta, Iberian ribbed newt
SE Asia: King Cobra, tokay gecko, Malayan horned frog, Vietnamese mossy frog, Asian water monitor, stick insects
- #17 - walkthrough-friendly Southeast Asian bird or mammal which could live in a Fragile Forest-esque habitat alongside Red-necked Flying Fox, Beautiful Fruit-dove, Pink-necked Green Dove, Red-billed Leiothrix, White-breasted Woodswallow, Palawan Peacock-Pheasant, Crested Wood Partridge, and Greater Indo-Malayan Chevrotain
White-rumped shama, hill myna