Animals with no natural predators are called apex predators, because they sit at the top (or apex) of the food chain. The list is indefinite, but it includes lions, grizzly bears, crocodiles, giant constrictor snakes, wolves, sharks, electric eels, giant jellyfish, killer whales, polar bears, and arguably, humans.
1- Capybara
The capybara is by far the friendliest animal in the world despite its intimidating size. These semi-aquatic animals are highly social, gentle, and friendly. Native to South and Central America, it's the largest rodent in the world, weighing up to 65kg.
Sheep are prey animals and are largely defenseless against predators, naturally nervous, and easily frightened.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
It's Natural to assume that animals with large teeth and aggressive reputation animals like lions or poisonous snakes are the world's deadliest killers. But appearance not sufficient to judge the creature's deadliness. Mosquito has recorded the maximum killing of people every year.
Friendliest Pet: Dogs
Dogs really are one of the best animals for humans. Loyal and sensitive to human emotions, dogs have gotten along with people throughout history. Canines were one of the first species domesticated by homo sapiens and still play significant roles in our public and personal lives.
And once that paralysis hits your diaphragm and rib muscles, you only have a few minutes before you suffocate to death. No, the fastest-acting venom on Earth belongs to the Australian Box Jellyfish or sea wasp. It's not the most potent venom out there. But encounter one of these guys and you'll be dead in 15 minutes.
Although humans can be attacked by many kinds of non-human animals, man-eaters are those that have incorporated human flesh into their usual diet and actively hunt and kill humans. Most reported cases of man-eaters have involved lions, tigers, leopards, polar bears, and large crocodilians.
Humans are top predators of many wildlife species, and our mere presence can create a "landscape of fear," according to researchers at the University of California, Santa Cruz. Fear of humans suppresses the movement and activity of pumas, bobcats, skunks, and opossums, which benefits small mammals.
Mosquitos are by far the deadliest creature in the world when it comes to annual human deaths, causing around one million deaths per year, compared to 100,000 deaths from snakes and 250 from lions. Perhaps surpringly, dogs are the third deadliest animal to humans.
The honey badger is not afraid of anything.
A kangaroo would win a fight against a human being.
In the wild, a kangaroo will try to grasp their prey and then tear into it with the claws on its feet. This will inflict devastating wounds on a human being or even disembowel them.
Yes, animals do practice revenge. Chimps do it, for example. Macaques do it, too, although not directly: if they cannot attack the offender because he is much stronger, they would hurt someone weaker instead, sometimes the attacker's relative.
Ungainly as it is, the hippopotamus is the world's deadliest large land mammal, killing an estimated 500 people per year in Africa. Hippos are aggressive creatures, and they have very sharp teeth. And you would not want to get stuck under one; at up to 2,750kg they can crush a human to death.
1. Box jellyfish
The venom's toxins can cause extreme pain, paralysis, delirium, shock, cardiac arrest and even death within minutes. The jellyfish has enough venom to kill 60 adults.
Black-footed cat
Black-footed cats (Felis nigripes) are Africa's smallest cat, and the deadliest of the entire cat family - with a 60% hunting success rate.
Dogs remain the nation's favourite animal
According to a silly YouGov analysis that has confirmed long-held suspicions of gender-based animal bias, men like lobsters, alligators and sticklebacks (it's a type of fish) whereas women prefer cats, ponies and miniature pigs.
There is no denying that one of your dog's most defining traits is their loyalty. This loyalty can be overwhelming and humbling, and has often been cited as an example of what human beings can learn from dogs.
Some of the most affectionate breeds include the Sphynx, Persian, Ragdoll, Birman, and Siamese. If you want a really small cat, dwarf breeds such as the Dwelf, Bambinos and Munchkins are known for being very affectionate.
The mute swan (Cygnus olor) is a species of swan and a member of the waterfowl family Anatidae.
The mosquito is responsible for more deaths worldwide than wild animal attacks. The mosquito is the silent predator who strikes and leaves disease in its wake. For this reason alone the mosquito should make us all fearful for it gives no warning of it's oncoming bite.
It's a common saying that elephants never forget. But the more we learn about elephants, the more it appears that their impressive memory is only one aspect of an incredible intelligence that makes them some of the most social, creative, and benevolent creatures on Earth.