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In South America, spread over nine countries, is the Amazon rainforest-the largest rainforest in the world. It covers an area of 55 square kilometers and contains many species of biodiversity, including species that have not yet been fully explored. The Amazon River, which flows through the forest, supports thriving animal and plant life. These forests are known as the "lungs of the Earth" because they absorb the most carbon dioxide on earth and release oxygen. These forests are also home to some of the most dangerous animals known to man. The Black Caiman is an Alligator found in the Amazon basin, which is one of the largest species in the world. This Amazonian tropical animal is a very skilled hunter and kills its prey by climbing up to it from underwater and then crushing it with its powerful jaws. He then drags the catch under the water until it suffocates. It kills everything from small fish, otters, dogs, and deer to jaguars and other caimans. Caimans can grow up to 6 meters in length. The black caiman's body is covered with hard scales that act as armor, but the color can vary between olive green, gray, brown or black. The species has bony ridges above the eyes. They have excellent hearing and vision and are equipped with strong teeth used for crushing food. You can also read about animals that may disappear forever. The jaguar, a large cat native to South America, is the region's top predator. The jaguar lives alone in large areas, similar to leopards or tigers in India, and hunts small land animals. It rarely comes into contact with humans, and when it does, it is usually because it tries to attack livestock. Although it rarely attacks, this cat is a dangerous animal because of its speed, stealth, strong jaw and sharp teeth that can pierce even turtle shells and human skulls. However, their numbers are declining due to habitat loss and hunting. It is also considered one of the strongest animals on planet Earth. Jaguars like to eat monkeys, crocodiles, deer, sloths, fish, frogs and anything else they can catch. Jaguars are solitary animals that like to live and hunt alone, however, this is not applicable during the mating season. The poisonous dart frog is an animal of the Amazon rainforest-a brightly colored frog that secretes venom from glands on its skin. This venom is very toxic and causes heart failure if ingested in large quantities. The golden poison dart frog is a rare species, but the most poisonous animal because it can kill twenty adults. Some tribes in the Amazon rainforest are known to use the venom of this frog to coat the tip of their arrows used to hunt other animals. Because of the depletion of rainforests, poisonous frogs are in danger, and the blue poison dart frog is threatened with extinction because of its popularity in the animal market. The bull shark is one of the three most dangerous shark species and often attacks people who disturb its territory. It lives in murky river waters and preys on other aquatic animals such as fish, dolphins, and snakes. Because it swims in shallow, muddy water, people cannot see it, and if they get too close, the shark attacks them. The shark's bite can be fatal because it drags its victims into the water and they either drown or die from blood loss. The species can grow up to 2.1 meters in length, however, females have been seen growing an average of 2.4 meters in length and weighing 130 kg. Males are smaller compared to females and weigh about 94 kg. They are one type of shark that can grow in salt and fresh water. The bull shark can switch between salt water and fresh water and vice versa. The bull shark will be able to survive even if the water level is only 60 cm, which is why they often come into contact with humans. In addition, female bull sharks prefer to give birth in shallow water because this will prevent their cubs from being eaten by larger sharks. Vampire bats are mammals that can fly, but vampire bats have an even more interesting feature, they are mammals that can only survive on blood. In addition, these species live in places of complete darkness, usually in caves, old wells, hollow trees, and buildings. Nocturnal creatures are most active during the early nights. The only bat species that can "adopt" another young bat if something happens to its mother.