Here’s my list of what kicks what’s ass. All these sites like bob’s animal fights and animal face off are really great for bar conversations but we’re not seeing the big pictures here. No science required, here’s my non-exhaustive list of kick-ass ordered from suck to awesome.
Slug

Nothing is more pathetic than a slug. Mother nature made it so that it looks like it’s already been defeated. I mean, what are you? Do you have any bones? Can I call a medic!? Say something!!! You suck slug and you are the lowest power in the universe.
Slugs are defeated by high winds and unhappy thoughts. No chance against anything. Lost already.
Field Mouse

A mouse would beat a slug in a fight. The slug would slowly be nibbled away by the mighty teeth of the ferious mouse (1/16 inch gnaw). A mouse can survive an 8ft fall. Colorblind and sight range of 10 feet. Excellent climbers. Travel at 12 feet per second (8 mph).
Not impressive. But good enough to beat a lowly slug.
My cat

But regardless of how fast a mouse is, a cat is faster. Predators are built/born to be superior than their prey. End of story. A household cat can run 30-35mph. Most cats can survive a fall of 30 feet. Felines’ spines are made of of tendions and muscle while humans’ spines are made of cartiliage. This is why a cat could jump straight up 5-6 feet onto your face if they wanted to. Cats have the largest eyes to body size of any predator. Their sense of smell is 14x what human’s sense is. Cats are the best hunters of mice on the earth in my opinion.
Wolf

My cat could not take down a wolf. A wolf is so much larger, it’d have no problem making my cat dead quick. Not a fair fight I know, but Wolf’s win on this list of what kicks what’s ass. Wolves are great pack hunters but not incredibly vicious alone. A wolf has 16x the hearing that humans have, 100x the sense of smell. Wolves have a 1500psi bite, 2x that of a german shepard. Wolves have 42 teeth.
Man

You could kill a wolf with a stick. You can kill a wolf with a rock. You can trap a wolf with no help from civilization or technology. You are smarter than a wolf. You can make spears. You know biology. My vote is, in a fair fight, a decently sized man in decent shape could kill a lone wolf. It wouldn’t be easy, but 90% of the time, my money is on a guy with a sharpened stick.
Police Dog

I’m putting police dog next because a coworker and I have had this debate for a while now and I did some reading. Professional trainers have seen person after person try to argue that a person can “kick this”. “do this” and they’ve seen people change their minds after getting into a padded suit and going against a police dog. A dog is too fast and bites too easily with too much force for you to fight barehanded. A person with a gun or a bat is a different story. In the wild, a man would win because he’d arm himself. In the context of Police Dog, I’m assuming that you’re in a city where carrying a large spear is probably illegal. Police Dog wins.
I think the only people in the world that would have a chance are the people who train the dogs. They know how to indimate them. They have experience fighting them with pads. They know how they move. They know what their targets are. Trainers have the upper hand with experience to compensate for natural ability.
Florida Panther

I saw one of these in a neighborhood in Florida and it was pretty crazy. He was digging through some garbage cans looking for food. He looked at me. I looked at him. He didn’t move. He stared at me as if to say, “you want a piece of this?”. Then, in a very proud way, he walked off slowly and deliberately. The shoulder muscles on it were crazy. Imagine a very large dog going to prison and getting chisled. That’s what a Florida Panther looks like. A panther could eat a dog no matter how trained they are.
Baboon (with condition/clause)

Baboons are underrated. I’m not saying a Florida Panther would just lay over and die for a Baboon. But if you gave a Baboon a weapon (like a chain, rope with spike), the Baboon would know how to weild the tool. Baboons are one of the few animals that have opposable thumbs AND know how to use tools. In a completely unarmed fight, a Baboon would be cat food. However, I’m assuming that Baboons could find a weapon in the wild.
Brown Bear

I hate this picture to the right. It’s a mounted bear with some redneck showing off that he can kill something with a gun he didn’t invent or build. So what. Humans seek superiority for no reason other than superiority. Screw you, hunter. Hope it falls on you.
But it’s a good example of how freaking big bears are. Size counts a long way and bears would have no problem sitting on a Baboon or what-not.
Siberian Tiger

40mph through the snow. 700lbs. 12 feet in length. Can eat 100lbs of meat in a night. “Tigers are built to kill large prey. Their hindlimbs are longer than their forelimbs, enabling the tiger to jump long distances. Tigers have heavily muscled forelimbs and shoulders, and paws equipped with long, retractable claws, which enable them to grab prey and drag it to the ground. A killing bite is delivered with powerful jaws and long canines.”
Nuff said.
Saltwater Crocodile

The image to the right is a fake, but to scale. 2 tons. 2500psi bite. The tiger could win, but it’s not a safe bet. Crocs are useless on land but absolutely amazing in the water. See a croc show if you can, you’ll be very glad you’re in your boring human city.
Polar Bear

1200 lbs. 10′ standing. 25 mph run. Biggest bear there is. A croc would die on land and these bears are good swimmers too. It wouldn’t be easy for either.
They strike from 100 feet away and have incredible jumping ability. Crocs are very impressive but I bet on the claws and bite rather than just bite.. I’m putting money on the polar bear.
Great White Shark

Adults range from 2,000 to more than 7,000 pounds, and can reach 23 feet long. But most adults are between 12 and 16 feet long. Using its powerful tail as a propeller, it can swim up to 15 mph in short bursts. Its 3000 teeth are pointed, serrated and razor-sharp for slicing through flesh. Unlike most fish, the great white shark can regulate its own body temperature, allowing it to maintain an optimum temperature for hunting, even in very cold water.
No bear or land animal would have a chance. Maybe an elephant or something huge in shallow water but that’s really not very fair.
Sperm Whale

A male sperm whale can be 49-59ft in length. 45-70 tons. It might not be the most fierce but I think a Great White would have very little chance to harm this thing and the Sperm Whale would have a good chance of biting it in half. Sperm Whales eat 1 ton of food each day which is essentially half of the largest great white shark. Amazing.
US Navy

_salutes_. Clearly, the U.S. Navy can destroy any of the above creatures. Humans have radio, tactics, language, tools and impressive weapons at their disposal. From what we know, we are the most harmful thing on the planet and the Navy is a good example of that.
Built with future growth in mind, their design is modular in nature, allowing for easy installation of entire subsystems within the ship. Space and power reservations have been made to accommodate future weapons and electronics systems as they are developed. Originally developed as Anti-Submarine (ASW) destroyers, 24 ships of this class were upgraded with the installation of a 61 cell Vertical Launch Missile System (VLS) capable of launching Tomahawk and Harpoon missiles.
The DD-963 SPRUANCE-class
Length 563 feet (171.6 meters)
Displacement 9,100 tons (8,190 metric tons) full load
Aircraft Two SH-60 Seahawk LAMPS III helicopters
Armament 2 – MK 143 Armored Box Launchers for Tomahawk SLCM or
1 – MK41 Vertical Launch System for Tomahawk SLCM
2 – MK 141 quad launchers w/ 8 Harpoon missiles
MK 29 launchers for NATO Sea Sparrow Missile System
2 – MK 15 20mm Phalanx CIWS Close-In Weapons Systems
2 – 5-Inch 54 Cal. MK 45 Guns (lightweight gun)
2 – MK 32 triple tube mounts w/ six Mk-46 torpedoes)
MK 112 Launcher for ASROC
Clearly, no biological lifeform can stand up to even a single ship of steel and firepower. Navy wins.
Superman

Superman could kick the Navy’s ass. Bullets bounce off him. He is a smart and nearly all-powerful being capable of spinning the earth backwards and changing time (this makes no sense). Regardless, the Navy would have a lot of sleepless nights and strategy meetings. I’m sure Superman would bust right through the White House/Pentagon walls and have some campy and inspiring dialouge.
Um, well, Superman beats the Navy.
Satan

Superman has a soul and Satan owns his ass. After Superman destroys all of mankind’s military (if not mankind after that), Satan pretty much has a contract out on Superman’s underpants. All the X-Ray vision and red cape flying isn’t going to keep Clark Kent away from an eternity of poking. poke, poke
Clearly, Satan has many, many ruthless minions. John Wayne has a fast draw. Superman could block his damned bullets but it’d keep him busy. Jeffery Dhalmer could munch on Superman’s arm and annoy him. Your 3rd grade teacher you asked be sent to hell could give Superman a pop-quiz. Satan has lots of options besides using his supernatural powers right-out.
God

To quote someone who is religious and more atuned to ‘eschatology’ (the study of the “last days” events, ie: the end of the world according to the bible): satan was servant of God, [he] wanted to be god, God said “no”, cast him out of heaven, satan no likey. Christians believe that God is all powerful so Satan loses here. God created everything and he could pull the plug on the whole deal.
Not even a straight royal flush can beat God. It’s like throwing a rock at the Sun. It’s like trying to complain to your congressman. It’s like beating the ground with a toothpick. You’d have a better fight if you started lifting yourself up from the ankles while underneath a oil freighter in the Pacific Ocean. God > everything. End of story.
That was educational.