Ligers and Tigons and Bears! OH MY!
Trouser snakes are good.
Evil. I was at the zoo one time when a big male attacked its keeper. he barely made it over the fence, and the bird almost caught him.
Some birds good, some birds evil. Bluejays and mockingbirds are evil. They torment my pets. Cardinals, good.
Bears, good. Lyle Lovett has a wonderful song, “Bears.” I wish I could quote all the lyrics.
Ostriches, evil. One of the funniest things I’ve seen is a scene in the movie “Animals are Beautiful People” where a native in a pitiful ostrich disguise attempts to steal an ostrich egg from the nest.
Gesundheit!
Octopus: good
Squid: evil
Cobra: evil
Mongoose: good
Angelfish: good
Devilfish: evil
Clownfish: varies
Jesus Lizard: good
Judas Goat: evil
Banana Slug: good
Sea Cucumber: evil
Sad to say, Eohippus is no longer with us. He is now known by the name Hyracotherium, which I guess means “bunny beast” or something. The fact that he was traveliing under an alias for all these years makes him unabashedly evil. That and the fact that they have a tendency to lure cowboys into lost valleys, where they can be eaten by dinosaurs.
Among prehistoric evil creatures, you’d have to include the mosasaurs and plesiosaurs. Ichthyosaurs, while also being aquatic reptiles, are good, however. They’re not sea monsters like the other two groups. Though they are deceptive, in that they look too much like fish.
Speaking of deceptive, Apatosaurus is evil. Not only does the name implicate him in being deceptive, but the name itself is deceptive in that the reason he was initially deemed to be deceptive really didn’t apply. A web of lies that tangled can only point to the unholy spawn of Satan himself. That and he usurped a perfectly good name by rules-lawyering, and lawyers are, of course, evil.
Other good/evil pairs:
Edaphasaurus = good, dimetrodon = evil. Ouranosaurus = good, Spinosaurus = evil.
Jerusalem crickets are evil.
Finches, naturally, are good. Unless they’re vampire finches. Then they’re just cool.
[QUOTE=Lemur866]
Many extinct animals are are also either evil or good.
QUOTE]
In the same vein, the Great Auk was Good, while the Moa was certainly Evil.
Nobody’s mentioned swans yet? Definitely evil. As are the geese with the exterior brain bulges…
Hyracotherium means “hyrax beast”. But this creature is one of the few extinct animals that have common names. Eohippus is just the english common name for Hyracotherium, just like “wolf” is the common name for Canis lupus. I’m gonna give ol’ Eohippus a pass on the name thing. But you have a point about luring with intent. Everybody has to save the poor Eohippus, and then you get separated from the group, and next thing you know the Hyaenodons are cracking open your skull. I’m particularly thinking of the cover of Anne McCaffery’s “Dinosaur Planet” here. Although she had the mistaken idea that pterodactyls are good just because those particular pterodactyls had golden “fur”. No, pterodactyls are just plain evil, ask David Innes.
Yes, but what about those huge staring eyes? And those teeth? No, Ichthyosaurs are evil, especially 18th century Ichthyosaurs when they still crawled on land. Dolphins good, Ichthyosaurs evil.
Ammonites are on the side of good with their cousin octopodes and are not evil like the squids. The more fluted an ammonite’s shell is, the more good it is.
Yeah, but a hyrax looks like a bunny with hooves. A short-eared bunny with hooves. A short-eared bunny with hooves that’s more closely related to elephants than bunnies. That’s just wrong.
Good point. Land-crawling, huge-staring-eye-having, ichthyosaurs are evil.
Lawyer Bird (Revicurvirostra americana): evil
Secretary Bird (Sagittarius serpentarius): even more evil
Those ugly deep sea fish with the big teeth and the glow-in-the-dark thing dangling over their head, they’re evil.
British Bull Terriers (see Spuds Makenzie), although not necessarily evil, cannot be trusted. Nothing with beady little eyes like that can be trusted.
Anglerfish! 
It all depends: How does it taste?
Let us refer to the seminar work of the respected zoologists, Simon & Garfunkel:
The monkeys stand for honesty,
Giraffes are insincere,
And the elephants are kindly but
They’re dumb.
Orangutans are skeptical
Of changes in their cages,
And the zookeeper is very fond of rum.
Zebras are reactionaries,
Antelopes are missionaries,
Pigeons plot in secrecy,
And hamsters turn on frequently.
Or the summary opinion of George Orwell:
Four legs good two legs bad
Definitely cold, heartless evil. We’re talking “evil cyborg sent back from the future to enslave mankind.” I mean, look at the eyes! I’m sure they even glow red. With a battle-hardened carapace and who knows what gruesome killamajigs hiding under there, it’s bad news, with a capital BAD NEWS. That and it’s got entirely too many legs to be wholesome.
Speaking of which: bugs in general are all evil. Just ask Danny Elfman:
Honeybees - good
Wasps - evil
On the other hand, they do seem to make him want to dance. Which could be a positive thing.
Wow…Godzilla has fleas.
Who’d thunk it?