I saw a half eaten deer at the beach once, coyotes killed the deer and left part of it the water. We still have some coyotes left in Ma, my state.
Cockroaches don’t seem to have any natural enemies , I sure wish they did !
That was going to be my first thought. Unless giant squid.
And as someone mentioned above, cougars/mountain lions. A healthy one in it’s natural environment has nothing that could take it. I discount that wolves could take it because they aren’t really in the same environment. And no bear could catch one, not that it would want to.
Killer whales. Orcas are the apex predators of the ocean – they’ll even eat great whites. (Seriously, if I had to be one animal on the planet, I’d be a killer whale. They’re total bad asses)
I agree. I once messed with an orca. I won’t make that mistake again.
If by “kill each other” you mean “the coyote will eat the cat on go on its happy way with a fully belly and wagging tail…”
Wild African cats (as in the little ones, not lions & leopards) are preyed upon by jackals and wild dogs.
My vote for “animal” with no natural enemy is antibiotic-resistant bacteria.
Pit orca against MRSA, in a cage match? I predict orca will be spanked hard…unless Chuck Norris is orca’s tag team member.
[QUOTE=Tibby or Not Tibby
My vote for “animal” with no natural enemy is antibiotic-resistant bacteria.
[/QUOTE]
([URL=“Bacteriophage - Wikipedia”]Throat-clearing noise](http://boards.straightdope.com/sdmb/member.php?u=55317).)
It sounds as if you are thinking of animals being attacked by other species for Food. But every adult animal is competing with the adults of its own species for Food, Habitat and mating. Two deer, or mutton sheep, will run headfirst at each other to win females.
Hippos don’t eat meat, yet they cause many deaths in Africa attacking humans on the water as intruders into their space, or trampling anything underfoot when they leave the water.
Yes, but prokaryotic bacteria are at least in the general neighborhood of “animal/plant” lifeforms. Viruses are more like tiny non-living rotten robots.
Lots of large predators are prey themselves when young. A baby python or anaconda can easily get snapped up by other larger animals.
And many large whale species have to watch out for packs of orca that can rip them to shreds.
As noted, surprisingly few mammals are PURE vegetarians. Most herbivores will eat carrion if it’s available, and many will pounce on a small bird or lizard for an occasional high protein snack.
Certain gorilla populations are at risk from leopards.
Giant tortoise.
Mola Mola.
I found the recent video of lions hunting elephants … unfortunately the lions were hunting calves so this doesn’t really fit the OP … although the elephant that was taken down isn’t a calf, nor is it a full grown adult …
Enjoy – “Lions attack elephant - Planet Earth - BBC” – 2006 – {YouTube 7’35"}
<Snark> Wolverine hunting Godzilla – {YouTube 4’55"} </Snark>
The version I heard once…
“Bigger fleas have smaller fleas,
Upon their backs to bite’em,
and smaller fleas have lesser fleas,
and so on, ad inifinitum…”
Sure they do
Inside your house? maybe not on a non microscopic level, outside?
Lots of things like to eat them.
Adult great blue whale?
Some Whales. Killer Whale or Sperm are examples.
The Alligator has natural enemies, such as large snakes, and hippos.
Saltwater crocodiles and goliath tigerfish appear to have no nonhuman predators.
Orcas will attack even mature blue whales. I don’t think a successful attack has been documented, but presumably they wouldn’t be trying if they couldn’t pull it off once in a while.
ETA: Orcas will attack and kill sperm whales on occasion, too.