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12 of the MOST Grumpy Animals on the Planet!

Grumpy animals are those that you shouldn’t approach if you don’t want to be harmed. These animals are generally grumpy and will attack anyone who gets too close. While some people enjoy these creatures’ company and know how to coexist with them, it’s important to remember that they can be dangerous.

Thus, knowing these animals is important in order to know which ones to avoid, and here are some of them.

12 Grumpy animals

1. Wolverine

Wolverine sitting on a log
Wolverine sitting on a log | image by Mathias Appel via Flickr

Scientific Name: Gulo gulo

Wolverines are a type of mammal native to North America, including Alaska and Canada. They have thick, furry coats, short legs, and large paws, allowing them to hunt small animals like rabbits and rodents.

These animals are known to be solitary and grumpy. Wolverines will attack any animal (or person) that gets in their way, and they have been known to drive bears and mountain lions away from their prey, as well as eat the food of other animals if they’re hungry enough.

Wolverines don’t make good pets due to their aggressive nature because they can be unpredictable and dangerous when angry or upset.

2. Honey badger

Honey badger with baby
Honey Badger with a pup | image by Derek Keats via Flickr | CC BY 2.0

Scientific Name: Mellivora capensis

The honey badger is an unusual but fearless and grumpy animal. It can be found in Africa, Asia, and parts of the Middle East. This creature is roughly the size of a small dog, but it has a very thick body.

The honey badger has a black coat with a white band that runs from its head to its tail. This easily provoked animal is unconcerned about what other animals think of it; it can be aggressive toward other animals, including large ones such as horses, cattle, and buffalos. They’re solitary creatures who dislike having anyone near their burrows.

3. Wild boar

Wild boar in the woods
Wild boar in the woods

Scientific Name: Sus scrofa

If you’re looking for grumpy animals, wild boars are one of the animals on the top list. They’re among the most dangerous animals on the planet and are known to be incredibly protective of their young. Wild boars can grow to be four feet tall and weigh up to 100 kilograms.

They typically have brown or black skin that’s incredibly tough, strong bodies, and tusks on their mouths. When a wild boar becomes angered, it’ll charge at you, knocking you to the ground and further injuring you with its sharp tusks.

4. Moose

Moose grazing
Moose grazing | image by Clydehurst via Flickr | CC BY 2.0

Scientific Name: Alces alces

A moose is a large, powerful deer with large antlers and a large head. These creatures can grow to be over 6 feet tall and weigh over 1,500 pounds. Moose are usually found in forested areas near streams and ponds.

These creatures aren’t to be trifled with due to their enormous size and powerful bodies. When threatened, they become irritated and can appear grumpy because they’re easily frightened and will charge at anything that can harm them. These animals also compete with other moose for females or territories, sometimes resulting in death.

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5. Raccoon

Raccoons in swamp
Raccoons in swamp | image by pedrik via Flickr | CC BY 2.0

Scientific Name: Procyon lotor

Raccoons are intelligent animals that have distinctive masks around their eyes. If you’ve ever seen a raccoon, you know they’re adorable and have an inquisitive nature. However, it’s still necessary to exercise caution around these animals, especially when they’re caring for their young.

Mother raccoons are grumpy and overprotective of their young, and these creatures will charge at you if they believe you’re a threat to them. These animals may also be carriers of diseases such as rabies, which can harm any mammal they bite.

6. African Honey Bee

African honey bee on red sunflower
African honey bee on red sunflower

Scientific Name: Apis mellifera scutellata

African honey bees are a species of bee that originated in Sub-Saharan Africa but are now found from South to North America. They’re about 19mm in size and look similar to honey bees, with golden yellow stripes on their abdomen and dark brown bands.

Because of their bad temper, these bees are known as “killer bees,” and they’ll attack if they feel threatened or disturbed. When angered, they can chase animals or people up to 400 meters and deliver a painful sting from a swarm of bees.

7. Koalas

Koala on a log
Koala on a log | image by Mathias Appel via Flickr

Scientific Name: Phascolarctos cinereus

Koala bears are native to Australia and can only be found there because their diet is limited to eucalyptus, a plant found only in the country. They’re also not bears, but marsupials, which means they carry their young in pouches on their stomachs.

This animal is known for being a real grump, and like any other solitary wild animal, it doesn’t like being held or being near other animals, and will attack with its sharp claws.

8. Jaguars

Jaguar at the zoo | Image by carlo quinteros from Pixabay

Scientific Name: Panthera onca

Jaguars are large, spotted cats with long tails and are the world’s third-largest cats. They’re usually found in low-lying habitats near wetlands. Jaguars are solitary creatures who don’t particularly enjoy being around other animals.

They‘re unpredictable creatures that’ll chase anything away, especially if it’s part of their diet. These animals are extremely territorial and will fight to defend their territory from other jaguars or other animals who try to share it with them.

9. Slow lorises

Bengal slow loris
Bengal slow loris

Scientific Name: Nycticebus bengalensis

The slow loris is a small, arboreal primate found in Asia. These animals are about the size of a housecat and have light brown to dark brownish-red coats. They have large eyes, round heads, and long torso, which allows them to twist and bend around branches.

Slow lorises are named for their slow movements, but they’re also known for being grumpy due to their territorial nature. When these creatures become enraged, they defend themselves with their venomous bite.

10. Bison

American Bison
American Bison by Ralph from Pixabay
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Scientific Name: Bison bison

The bison is a large, shaggy-haired animal that can grow to be as tall as 9 feet. It has a large head, a hump on its shoulders, and a long tail that it uses to express its mood.

Despite the fact that this animal is usually found in groups and is a herbivore, it’s still considered one of the grumpy animals. Male bison are naturally aggressive to assert dominance over other bulls. When threatened or enraged by something, a bison will charge forward at full speed, using its horns to harm its target.

11. Kangaroos

Red kangaroo resting
Red kangaroo resting

Scientific Name: Macropus rufus

Kangaroos are large, hopping marsupials native to Australia and New Guinea. They can grow to be more than 5 feet tall and are one of the most unique animals due to their body shape, which includes powerful hind legs and long, strong tails that allow them to jump up to 10 feet high.

Wild kangaroos can be violent toward other animals, especially when they’re hungry. They’ll use their sharp claws and large hind legs to injure the target severely.

12. Tasmanian Devil

Tasmanian devil
Tasmanian devil by Penny from Pixabay

Scientific Name: Sarcophilus harrisii 

Tasmanian Devils are small, grumpy marsupials found only in Tasmania. These animals have a thick, black coat of fur that gives them the appearance of small bears. These cuddly animals, however, are known to be easily provoked and will use their haunting screams that sound unearthly, which is where their names came from.

They also display their large, sharp teeth to frighten off their enemies, particularly when fighting for food.