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.
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.
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.
In terms of the number of humans killed every year, mosquitos by far hold the record, being responsible for between 725,000 and 1,000,000 deaths annually. That is not to say these tiny insects set out to kill, however.
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.
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.
The honey badger has been called the world's most fearless animal because it doesn't hesitate to attack animals much larger than itself- even lions and crocodiles!
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.
2. Mosquito. Clocking in at just three millimeters at their smallest, the common mosquito, even tinier than the tsetse fly, ranks as the second most dangerous animal in the world.
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.
The mayfly has the shortest lifespan of any animal in the world.
It may come as a surprise that many animals, including some apex predators, are terrified of humans. According to scientists, it's because we're big and loud and 'novel' to them. And so to protect themselves, they try to avoid us as much as possible.
'In the sense of producing emotional tears, we are the only species,' he says. All mammals make distress calls, like when an offspring is separated from its mother, but only humans cry, he says.
According to the Independent, honey badgers have been described in the Guinness Book of Records as the "most fearless animal in the world" and can even fight off much larger predators like lions and hyenas.
However, if a kangaroo rat drinks water, the necessary bodily liquids and vitamins are flushed out, and it dies as a result of dehydration.
Bullfrogs… No rest for the Bullfrog. The bullfrog was chosen as an animal that doesn't sleep because when tested for responsiveness by being shocked, it had the same reaction whether awake or resting.
Sturdy turtles
Slow and steady really does win the race. Turtles have been known to live for centuries, and researches have found that their organs don't seem to break down over time. The New York Times reports that turtles might even be able to live indefinitely if they are able to avoid predators and disease.
Cardiovascular diseases are the leading cause of death globally. The second biggest cause are cancers.
The ocean quahog is a species of edible clam, a marine bivalve mollusk. Ocean quahogs live in the Atlantic and can live more than 400 years old. At 507 years of age, Ming the clam broke the Guinness World Record as the oldest animal in the world. Ming the clam was dredged off the coast of Iceland in 2006.
Farm animals – mainly horses and cattle – are actually the biggest killer, with their category ('other' nonvenomous mammals) responsible for 576 deaths (36 percent of all fatalities) in the period, claiming an average of 72 fatalities per year.