ok, here is what most oddworld creatures name comes from, and what it would be on earth:
mudokons: dunno, birds/ humans
gluckons: glottons/mullusks, octipusses
sligs: slugs/pigs, slugs
octigi: octipi (or is it octipuses?)
scrabs: crabs, dunno, man eating horses (lol)
paramites: parasites/mites, spiders
fleeches: furrocious/frightning leeches, snakes
meeps: sheeps
interns: interns X_X, monkeys
vickers: dunno, monkeys
gabbits: rabbits, frogs/toads
gabbiar: cavviar, frog/fish eggs
steef: stags/beef, stags, cats, centuars
wolvarks: ardvarks/wovles
clackerz: there name is the sound chickens make, chicken
elum: mule, cammel
zapflies: fires, fireflies
fuzzles: fuzzy, dunno
ratz: rats (no way!
)
chickpunks: chickmunks, squirral
skunkz: skunk
thudslugz: slug ( as in the bullets), dung beetles
boombats: bats (realy?
)
lol, that's all I can think of, I hope it helps you find what the oddworld animals are in earth.
I added what the name meant IMO first, so maybe it would give you an idea of what the oddworldian creature is.