This is the obligatory response copypasta to that Koala copypasta:

I don't know why it is that these things bother me---it just makes me picture a seven year old first discovering things about an animal and, having no context about the subject, ranting about how stupid they are. I get it's a joke, but people take it as an actual, educational joke like it's a man yelling at the sea, and that's just wrong. Furthermore, these things have an actual impact on discussions about conservation efforts---If every time Koalas get brought up, someone posts this copypasta, that means it's seriously shaping public opinion about the animal and their supposed lack of importance.

Speaking of stupidity and food, one of the likely reasons for their primitive brains is the fact that additionally to being poisonous, eucalyptus leaves (the only thing they eat) have almost no nutritional value. They can't afford the extra energy to think, they sleep more than 80% of their fucking lives.

Non-ecologists always talk this way, and the problem is you’re looking at this backwards.

An entire continent is covered with Eucalyptus trees. They suck the moisture out of the entire surrounding area and use allelopathy to ensure that most of what’s beneath them is just bare red dust. No animal is making use of them——they have virtually no herbivore predator. A niche is empty. Then inevitably, natural selection fills that niche by creating an animal which can eat Eucalyptus leaves. Of course, it takes great sacrifice for it to be able to do so——it certainly can’t expend much energy on costly things. Isn’t it a good thing that a niche is being filled?

Koalas are no exception, when their teeth erode down to nothing, they resolve the situation by starving to death

This applies to all herbivores, because the wild is not a grocery store—where meat is just sitting next to celery.

Herbivores gradually wear their teeth down—carnivores fracture their teeth, and break their bones in attempting to take down prey.

They have one of the smallest brain to body ratios of any mammal

It's pretty typical of herbivores, and is higher than many, many species. According to Ashwell (2008), their encephalisation quotient is 0.5288 +/- 0.051. Higher than comparable marsupials like the wombat (_{0.52), some possums (}0.468), cuscus (~0.462) and even some wallabies are <0.5. According to wiki, rabbits are also around 0.4, and they're placental mammals.

additionally - their brains are smooth. A brain is folded to increase the surface area for neurons.

Again, this is not unique to koalas. Brain folds (gyri) are not present in rodents, which we consider to be incredibly intelligent for their size.

If you present a koala with leaves plucked from a branch, laid on a flat surface, the koala will not recognise it as food.

If you present a human with a random piece of meat, they will not recognise it as food (hopefully). Fresh leaves might be important for koala digestion, especially since their gut flora is clearly important for the digestion of Eucalyptus. It might make sense not to screw with that gut flora by eating decaying leaves.

Because eucalyptus leaves hold such little nutritional value, koalas have to ferment the leaves in their guts for days on end. Unlike their brains, they have the largest hind gut to body ratio of any mammal.

That's an extremely weird reason to dislike an animal. But whilst we're talking about their digestion, let's discuss their poop. It's delightful. It smells like a Eucalyptus drop!

Being mammals, koalas raise their joeys on milk (admittedly, one of the lowest milk yields to body ratio... There's a trend here).

Marsupial milk is incredibly complex and much more interesting than any placentals. This is because they raise their offspring essentially from an embryo, and the milk needs to adapt to the changing needs of a growing fetus. And yeah, of course the yield is low; at one point they are feeding an animal that is half a gram!

When the young joey needs to transition from rich, nourishing substances like milk, to eucalyptus (a plant that seems to be making it abundantly clear that it doesn't want to be eaten), it finds it does not have the necessary gut flora to digest the leaves. To remedy this, the young joey begins nuzzling its mother's anus until she leaks a little diarrhoea (actually fecal pap, slightly less digested), which he then proceeds to slurp on. This partially digested plant matter gives him just what he needs to start developing his digestive system.

Humans probably do this, we just likely do it during childbirth. You know how women often shit during contractions? There is evidence to suggest that this innoculates a baby with her gut flora. A child born via cesarian has significantly different gut flora for the first six months of life than a child born vaginally.

Of course, he may not even have needed to bother nuzzling his mother. She may have been suffering from incontinence. Why? Because koalas are riddled with chlamydia. In some areas the infection rate is 80% or higher.

Chlamydia was introduced to their populations by humans. We introduced a novel disease that they have very little immunity to, and is a major contributor to their possible extinction. Do you hate Native Americans because they were killed by smallpox and influenza?

This statistic isn't helped by the fact that one of the few other activities koalas will spend their precious energy on is rape. Despite being seasonal breeders, males seem to either not know or care, and will simply overpower a female regardless of whether she is ovulating. If she fights back, he may drag them both out of the tree,

Almost every animal does this.

which brings us full circle back to the brain: Koalas have a higher than average quantity of cerebrospinal fluid in their brains. This is to protect their brains from injury... should they fall from a tree. An animal so thick it has its own little built in special ed helmet. I fucking hate them.

Errmmm.. They have protection against falling from a tree, which they spend 99% of their life in? Yeah... That's a stupid adaptation.

Meh, I'd rather let this copypasta be forgotten. It turns cool points into "bad" ones while exaggerating the rest. For example, it's COOL that this animal evolved specialized digestive organs to process a food in a biological niche that other animals can't exploit. There's great variety among animal brain shapes / textures, and having such a complex brain doesn't guarantee that all humans are that "smart". Other animals are also sedentary or sleep a lot (sloths, cats) and this is seen as being efficient. Other animals also do things that are pretty gross when viewed through a human lens.

On top of all that, it feels like justification for everything humans are doing to endanger the population.

Wasps taking a close second.

They deserve the way they mate.

I'm team seagulls until I hear more about this nilla incident

Growing up in coastal scandinavia, learning to hate seagulls isn't part of one's upbringing. It comes naturally after experiencing living nearby them.

Yeah I do have an immense dislike for seagulls.

Yesterday one took a biscuit out of my kids hand.

Look, everyone told you not to stroll on that beach.

I mean, the stray cat I hang out with does all these things, too

Killed the most humans is a pretty strong qualifier

Mosquitoes pose a viable food source for so many creatures and their extinction would have serious ramifications on the ecology of regions. That said, I want the little fuckers gone!

Got to meet one last month!

I was seated, and it jumped up on my leg to get some greens I was holding.

It's true, most chill animal around.

They are the host of a type of tick (Amblyomma sculptum) that carries a bacteria which causes a nasty disease.

They aren't always as chill as the internet portraits them. If they're with their offspring they can and will protect them. Being bitten by the largest rodent in the world is not a good way to start your day

Re N4: IIRC, The Presidents of the USA made a song about them.

Millions of leeches, leeches for me
Millions of leeches, leeches for free

Ticks actually sit on plants close to the ground and latch onto you when you touch the plant. Important knowledge cause you can protect yourself 99% with ankle-high boots, long plants and stuffing the pants legs into your socks.

See, thats because you don't know how to raise cats. It's ok. Most people don't.

Here's what you do.

Step 1, hire a clown to stand naked in the closet with a chainsaw. You'll need this later.

Step 2, go onto your favorite dating site, find a mate, and spend the night at a hotel.

Step 3, fall in love

Step 4, move in together

Step 5, adopt a few cats. Nothing much. Just a few. 22 should be enough.

Step 6, have your girlfriend go on a fetish dating site and find a guy who's into chastity. She doesn't have to sleep with him ever, but now he'll clean the house, clean the 44 litter boxes daily, cook the meals, tutor your kid in his 2nd grade math homework, tend to the garden, wash the car, clean the gutters, and then sleep in a dog cage at night.

Step 7, anytime the cats start their bullshit, you use a little water bottle to spray them and yell NO! Eventually they'll assosiate no, with being told you don't like what they're doing.

Step 8, fuck with your cats brain. Stare at them wide-eyed. Just dead stare at them without moving a muscle. Eventually they'll get bored, and look away. That's when you start salsa dancing behind their back. Everytime they glance at you, you stop, and stare at them. If they walk away, follow them and stare. Until they look away. Then more salsa dancing.

Step 9, when they fall asleep, wrap your arms around them and cover them in kisses for being such a good cat.

Step 10, do a barrel roll!

Step 11, now when your cat starts crying outside of the door, you stare at them. They should begin to realize you don't like them doing that, and now they stop.

Step 12, from now on, anytime they're annoying, you be even more annoying! But not aggressive. I did not say be violent. I did not say to do anything bad. But if your cat is annoying, maybe you go over and tickle them while making turkey gobble noises.

And that should do it. A house with enough cats, and a free cleaning service to help maintain all those cats!

Now you can get on with your day!

Cats are nature's anarchists and I love them. Would still rather have dogs in the house though.

mosquitos are natures jerks, they prank humans by spreading malaria

Why do people hate lawyers? I genuinely don't understand.

Growing up, we'd douse cotton balls in peppermint oil and drop them in corners or under furniture to help keep the mice - and some insects - away. It won't kill them, but they find it very irritating and will avoid the area if they can.

This is not a great idea if you have pets, mostly because they'll either try to eat the cotton balls or get annoyed by the smell. But as a bonus for you, your house will smell minty fresh!

I know right? The one in my left nostril is a sweatie

I saw a post that had similar complaints and recommended ducks. If you're keeping chickens for eggs, consider ducks

You just really like the eggs I guess?

They don't seem to be aware they're delicious with barbecue sauce.

OP has kindly asked to avoid stating humans.

I think we're the best animal. We're fundamentally flawed, but we're basically Batman. No other species that im aware of can go to the moon, and the seabed, and communicate basically instantly with other members on the other side of the planet.

I mean we've got serious problems, and we kill pretty much anything in our path, but we're definitely awesome.

They are mean but I like them and hornets because they kill pests. As long as they're not making nests in my yard yellow jackets are cool with me.

Bald-faced hornets have a really bad reputation but I had a nest under my roof overhang and they were awesome. Built a beautiful hive and never gave me any trouble even when I walked right below them. There were a couple days last year where invasive June bugs were swarming around my house and I saw a hornet snatch one right out of the air which was pretty badass.

A swarm of them have been circling my neighbourhood shrieking the last few days.

No, the question was about the worst animal, not the most awesome.

Big creature that primarily eats grass. Bad at digesting grass. Worse at digesting other things with gas and intestinal issues being common causes of death.

No idea how something so bad at eating survives on it's own

They are untrustworthy, and some like to bite cars.

Goodbye Horses

No doubt completely irrational. 😁