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.
Animals with no natural enemies are known as apex predators. They are, as far as science is concerned, at the top of their respective food chains.
Quokkas, famous for posing in selfies, are native to Rottnest Island where about 10,000 live a sheltered life free from predators or traffic. They are classified as a vulnerable species and have been almost completely wiped out on the mainland. Campbell isn't the first tourist to snap a selfie with a quokka.
But despite their size and strength, there are animals that do prey on them. Man appears to be their biggest predator. Big cats like leopards and panthers sometimes kill and eat these big reptiles. Large snakes can also do a lot of damage to alligators and crocodiles.
#1. Wolf. The wolf is the top apex predator in the world.
Grizzlies should be recognized among the smartest predators because they are some of the most adaptable and capable animals on the planet. Chimps and elephants might be a little more sophisticated and human-like in their intelligence, but Grizzlies aren't far behind.
It depends on your definition of predator. Lions, gray wolves and great white sharks have one thing in common: They're top predators. Their diets consist almost entirely of meat, and except in rare instances, these animals have no natural predators — except humans.
Rottnest Island is known worldwide to be the home of the happiest animal on Earth – the Quokka (Setonix brachyurus). Close relatives of Wallabies, these tiny animals are found all over Rottnest Island, where their survival is largely attributed to the exclusion of any natural predators.
Koalas are the cutest — and they also rank among the laziest! The adorable fur balls only wake for two to six hours a day! Like giant pandas, Koalas' near-constant state of slumber is food-related.
Sea sponges don't fight. They can't even think about fighting. They are content to watch daytime TV and political talk shows.
Animals fight for food, mates and sometimes just for fun. They can be bloody and brutal, but equally gripping to watch. Animals sometimes fight to the death to secure their status in a group and even if they survive, they can inflict some serious damage in the process.
An elephant, of course, especially an adult elephant. Elephants are the kings (and queens since they're matriarchal) of brute strength among land animals.
Adult polar bears have no natural predators, though walruses and wolves can kill them.
Predators. Adult polar bears have no natural predators except other polar bears. Cubs less than one year old sometimes are prey to wolves and other carnivores.
Aside from humans, lions are the only predators powerful enough to kill an elephant. The males, being 50% heavier than the females, are especially suited to the task. It typically takes seven lionesses to kill an elephant, but just two males could do the same. Even a single male can overpower a young elephant.
Lions have few predators to fear other than humans. A very young or sickly lion might fall prey to hyenas. Cubs may be attacked and eaten by adult male lions. Lions are most threatened by humans who hunt them and encroach on their habitat.
"Lions are wary of crocodiles and will generally avoid the water to stay away from crocs," writes NatGeo TV.
Fear of humans suppresses the movement and activity of pumas, bobcats, skunks, and opossums, which benefits small mammals. As their own predators respond to their fear of humans, deer mice and wood rats perceive less risk and in turn forage for food farther away and more intensively, they found.
Broadly speaking, evolution simply means the gradual change in the genetics of a population over time. From that standpoint, human beings are constantly evolving and will continue to do so long as we continue to successfully reproduce.
Based on the fossil evidence dating back 7 million years and studies in living primate species, Fuentes and others suggest that primates, including early humans, were the prey of many predators, including hyenas, cats and crocodiles.