Animal Beginning With 'O'

[Miss Muffet]

I'm trying to compile a concise list of animals (not bird or fish types) so we can have a 'database'. I'll add a new letter every few days, if you can all add onto the thread we should create a veritable zoo!

O

Ocelot
Octopus – Common, Lesser/Curled
Okapi
Oncilla
Opossum – Black-Shouldered, Brown Four-Eyed, Bushy-Tailed, Fat-Tailed, Four-Eyed, Gracile-Mouse, Mouse, Patagonian, Short-Tailed, Slender Mouse, Thick-Tailed, Water, Woolly, Woolly-Tailed.
Orange Tip Butterfly
Orange-Spotted Tortoise
Orang-utan - Sumatran
Orca/Killer Whale
Oregon Silverspot Butterfly
Oryx – Arabian, Scimitar-Horned
Otter – Cameroon Clawless, European, Giant, Giant River, Long-Tailed, Marine/Sea, Northern Sea, River, Southern River, Southern Sea
Ox
Ozark Big-Eared Bat