Here's a list I made for fun a while ago.
Tasmanian Devil, Tasmanian Tiger, Manatee, Naked Mole Rat, Colugo (flying lemur), Wolverine, Moose, Flying Fox
BIRDS:
Cassowary, Hummingbird, Turkey, Albatross, Crane/Egret, Puffin, Swift, Kingfisher, Hornbill
REPTILES:
Spider-tail Viper, Flying lizard, Thorny devil, Iguana, Monitor Lizard/Komodo Dragon
AMPHIBIANS
Flying frog, Rain frog (something small and cute compared to Seismitoad)
FISH:
Hagfish, Sawfish,, Thresher shark, Stingray, Knifefish, Moray eel, Tigerfish, Salmon, Tripodfish, Flying Fish, Oarfish, Swordfish/Marlin
INVERTEBRATES:
Earthworm, Leech, Velvet worm, Springtail, Stick insect, Termite, Giant water bug/Water beetle, Treehopper, Lantern fly, Earwig, Backswimmer, Assassin bug, Stink bug, Flea, Robber fly, Mantis shrimp, Spider crab, Horseshoe crab, Vinegaroon, Solpugid (sun spider), Harvestman (daddy long legs), Cuttlefish