Top 15 Aggressive Animals In The World


Aggressiveness is often associated with animals. And sometimes it is also considered as their natural trait. But there are some wild creatures that stand apart and are feared the most for their vigorous behaviour. This is the most probable reason why these animals are considered the most harmful. Here are the top 15 most aggressive animals.



Black Mamba living in the sub-Saharan desert in Africa was considered the most dangerous snake in the world. The poisonous snake is brownish in colour, but the inside of its mouth is black. Just two drops of its poison are life-threatening and can kill a person. These snakes can grow as long as 14 feet in length and survive for 11 years. Its harmful venom is composed of a neurotoxin, cardiotoxin and other powerful toxins. Black Mamba is considered the fastest land snake in the world, travelling up to 12 miles per hour. They turn excessively aggressive when they feel threatened. Its venom is neuro-toxic and travels at really high speed into the nervous system.

One of the longest snakes in the world can reach upto 14 feet in the length and weighs approximately 3.5 pounds. Talking about the appearance, it has a slender body with smooth scales. Despite the name Black mamba, they are not actually black in colour but it depends on the body colouration depending on the habitat and it can be green, grey or yellow. The name is black mamba because the inner part of the mouth is totally and it will display it when they are in danger. The snake species can survive up to 11 years in the wild.



The largest surviving carnivorous marsupial, Tasmanian Devil is one of the most aggressive animals in the world. The adult Devil is of the size of a small dog and the newborn is as small as a raisin. They have the strongest bite of any living mammal. One of the toughest animals in the world turns most aggressive while mating as they have to fight with other males in the clan and only the one who wins the battle can have the female for him. Tasmanian devils are carnivores and are often found feeding on dead and rotten animals.

Talking about the appearance, the Tasmanian devil body is covered with black fur, however, it has white patches in the chest, rump and shoulders. The species have an excellent sense of eyesight and smell that is primarily used for laying down its prey. The lifespan of the species is approximately 7 and 8 years in the wild. The solitary creatures can fight with other animal species to fight for the territory, however, prior to the fight, it uses sharp sneezing sound to challenge the opponent.



The 6 feet tall Cape buffalo is also known as the Death Buffalo. Their extremely aggressive and powerful behaviour has earned them the name. They run at a speed of 57 km/hr. It is also the only member of the buffalo tribe that occurs naturally in Africa. They feed on grass and need a lot of water. One of the fierce animals in the world are known for their attack and defence technique. The circle back on their pursuers and counter-attack. Their massive body, huge head and powerful horns are strong and deadly.

Talking about the appearance, the body of the buffalo is covered with dense hairs ranging from black to brownish in colour, However, they have large heads with a broad chest and strong legs. The species is a gazer (mainly feed on grass) but when the grass sources are scarce it has been seen eating shrubs and trees. It is generally seen in herds that contains one or two males with a majority of females and their offspring. The average lifespan of the African buffalo is 20 years in the wild.



The cassowary is the one the largest birds still alive. Not only that, it even holds the Guinness World Record for the world’s most dangerous bird. There are three extant species of this bird. These shy birds run at a speed up to 50 km/h. They can jump up to a height of 1 meter and the 12 cm deadly claws can tear the prey into two pieces. The most feared thing of this flightless bird is its kick. The southern cassowary is the third tallest and the second heaviest living bird.

The bird has a large body covered with black feathers with bluish skin and reddish neck. They have a reddish neck with part of the legs are blue, however, lower parts are grey in color. Also, the color of the neck and head keeps changing depending on the mood of the bird species. The sense of hearing and excellent are excellent and they can even detect low-intensity sounds coming from long distances. The birds have a lifespan of 12-19 years in the wild and 40 and 50 in captivity. It is also listed as one of the dangerous birds in the world.



Wild Boars or wild swine have deadly tusks and are known as one of the widest ranging mammals in the world. They live in the wild and are omnivores in nature. Their major need is carbohydrates. Though Wild boars rarely attack humans, their attack can be very dangerous. The boar’s attack with their jaws and foam comes out of their mouth. They often hit their head and attack with their tusk.

The Wild boar’s body is covered with a double coat of fur that can be grey, red, brown and black in colour, however, the upper coat has a harsh hair but the undercoat is much soft. They have a long and rubbery snout that can be primarily used for the digging of underground roots and bulbs. The medium-sized mammal is an omnivore that loves to eat berries, leaves, fruits, lizards, worms and snakes. The male species of the group lives a solitary life but they come up during mating season. The lifespan of the species is 10 years in the wild and up to 25 years in captivity.



Sun Bear found in Southeast Asian Tropical forests is the smallest member of the bear family. These nocturnal animals are highly aggressive and mostly attack without any cause. Their long claws are sharp teeth have enough power. Sun bears live in trees. They are solitary creatures and prefer to meet only when the mating period comes. They mostly feed on fruits, and sometimes small insects and small rodents.

The smallest species of carnivorous bear is covered with dense fur that can be brown, black or grey in colour, however, it has a U-shaped patch of white, yellow or orange fur on the chest that looks like the rising sun. They have a strong and muscular body with small ears and large canine teeth. They can be seen anywhere right from the ground to high in the treetops. These are solitary creatures that occasionally roam in couple and they have seen barking when threatened. The lifespan of the species is approximately 25 years in the wild and over 30 years in captivity.

Also Read: Top 10 Carnivorous Bears In The World



Belong to the Mustelidae family; Wolverine is the largest land-dwelling species. These solitary animals are polyamorous. They have great smelling power and can travel up to 24 km in search of food. They are omnivores in nature. They are often termed as the killing machine as they carry no fear in their heart. Weighing 15kgs to 30kgs, Wolverine’s jaw is called the iron jaw for the strength it carries. It is one of the most popular US animals in the world.

The mammal whose appearance is similar to a small bear has a black to brownish with light stripes on the sides of the fur. The thick fur helps them to prevent freezing and have pads with sharp claws that help them from slipping on the ice. The terrestrial animals can only climb trees and trees in case of a need and known to have large heads with round ears and powerful legs. Though they have poor eyesight, however, an excellent sense of hearing and smell helps them to find the prey. The lifespan of the prey is approximately 7 to 12 years in the wild.



The hippopotamus is the Latin word that means “Horse of the river”. This semi-aquatic animal mostly feeds on grass. Though found in a herd, hippos are not social animals. Thus their behaviour has always been questionable. Hippos are termed as extremely aggressive animals. The attack on small boats and even kill humans. They are the world’s third largest mammal. Hippos are even aggressive when there is a lack of sufficient water and food. The large size of Hippos is often scary. The newborn weighs as much as 100 pounds. Researchers believe that the aggressive and dominating character of Hippopotamus has kept it powerful throughout the long years. It is also listed as one of the most dangerous animals in the world.

The third largest mammal in the world has excellent eyesight, sense of smell and hearing. They are herbivores and loves to eat grass, fallen fruit, sugar cane and corn. Despite the size of the species, they can run faster than humans and have a lifespan of approximately 45 years in the wild. They are mostly seen in herds consisting of 10-30 animals and loves to spend most of the time in the water because they don’t have sweat glands. Whales and dolphins are considered as the closest relative of Hippos.



The bloodshot red eyes with bold white eyebrow give a terrifying appearance to Northern Goshawk. These birds are found across Northern America and Eurasia. The Goshawk is extremely protective towards its nest. They don’t even hesitate to attack humans if they feel threatened. They feed on insects, birds and even reptiles. In the case of Northern Goshawk, the females are 25% heavier than the males. The breeding pair perform a sky dance as part of their courtship.


Image Source: Wikimedia


The 23 feet long Saltwater Crocodile is World’s largest living crocodile. One of the apex predators in the world is considered to be the most aggressive of all. Not only that, they are dangerous to mankind too. There have been many reports of Saltwater crocodiles attacking boats and eating humans. They are excellent swimmers and can swim as long as 900 km. They live for about 65 years.

One of the aggressive animals in the world and the world’s largest living reptile can grow up to 5m in length, however, there are reports that they can even measure 8m. They are native to northern Australia to eastern India and South-east Asia. The species have long lifespan and reptile can live up to 65 years. They are known to excellent swimmers that can travel up to 900 kilometers in the sea. It loves to eat fish, mammals, and birds and prefer to hunt at night.

Aggressive Animals

11. Wedge Tailed Eagles

The bird is known as the largest bird of prey in Australia and fifth if we talk about the world. It has a massive wingspan of 2.3 meters, howvever, females have slightly larger wingspan and even heavier than males. The bird species used to build a nest on very high trees with the help of dead sticks. The nests can be 2 metres wide and 3 to 4 meters high with an average weight of 400 Kg. At the time of gestation, they lay 1 to 3 eggs at a time. The young eagles are light brown in colour and get darker with the age and they became almost black at the age of 10.

12. Moose

Moose is the largest animal of the deer family and mostly seen in the northern hemisphere and it prefers colder climate. The moved to summers near rivers and streams and the good news is that the species is not endangered. Both male and females are of the same height around 4-6 feet at shoulders, however, they have different weight. The animal species are herbivores that plant eaters and they love to eat plants from the river, like pondweed and pond lilies. The average lifespan of the species 15-25 years in the wild and 20 to 25 years in captivity.

Also ReadTop 10 Endangered Animals In The World


Image Source: Wikipedia

13. Wasps

One of the most aggressive animals and insects are relatively quiet and cute, howvever, people hate them because they used to build a nest near the homes and can damage shrubs and trees. The fierce predators and they hunt and eat almost every insect pest that harms crops. They eat aphids, grasshoppers, and other bees as well. They used to find everywhere except Antarctica and it can sting over and over again. IT can make nests from paper and can chew up strips of bark and spit it out again to form a rough paper, however, some of them make nests in basements, sheds and cool places.


Image Source: Wikimedia

14. Geese

One of the most aggressive animals have gone extinct a few years ago, howvever, they have returned now and in some places, they are so much in majority that people don’t like it. The aggressive bird species will chase and nip people and also make messes on the grasses. The babies of the species are cute and they build nests near lakes and rivers. The nests have a flat and wide shape made up of grass, twigs, mud and feathers.


15. Kangaroos

The species can grow upto 1 to 8 feet in height and weight approximately 40 to 200 pounds. Talking about the appearance, Kangaroos can be seen in three different colours namely, red, grey or brownish. They are known for their large and strong tail and the long legs can be used for jumping. Also, feet can be used to alert the members of another family about a dangerous situation. The animal species loves to moves by jumping and it also preserves energy. The average lifespan of the species is 8 to 10 years in the wild and 20 years in captivity.


So, these are aggressive animals in the world. Do post your comments.

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