Have you ever wondered what the smartest bird on our planet is? Which creature has ears between its legs? How do bears go to the toilet during hibernation? I believe that many people have thought about these strange questions in their brains. And for all animal lovers and cold knowledge enthusiasts, they may be willing to listen to some interesting facts related to animals. And today, Jerry will introduce you to 10 interesting facts that are quite interesting for animal lovers.
<h1 class= "pgc-h-arrow-right" >1, the cassowara is the most dangerous bird in the world</h1>
The cassovite can't fly, but its two powerful legs are lethal, and their claws look like several daggers. It is the second heaviest bird in the world, after its cousin ostrich. In the Guinness Book of World Records, the firefighter is rated as the most dangerous bird in the world. Because these shy-looking birds can cut items in half with a fatal kick. Fire animals can run up to 50 km / h, it can be said that they can easily catch up with humans, they can also jump to a height of 1 meter, they also have 12 cm long paws, therefore, they are very dangerous birds.
<h1 class = "pgc-h-arrow-right" >2, kiwi wings are hidden under feathers</h1>
Kiwi birds are also flightless birds, and at first glance, they have no wings. But in fact, under its fluffy feathers, there are tiny wings.
<h1 class = "pgc-h-arrow-right" >3, alligator turtles will hunt by fishing</h1>
The alligator turtle is the largest freshwater turtle in North America. They have strong jaws, sharp beaks, bear-like claws, and strong tails. Crocodile turtles do eat some aquatic plants, but it is primarily carnivorous, feeding on a variety of smaller creatures such as fish, frogs, snakes, worms, clams, crayfish and even other sea turtles.
According to the St. Louis Zoo in the United States, the alligator turtle catches prey through a very clever evolutionary adaptation: its tongue appendages look like worms when they squirm. And those fish tricked by their tongues swim into the jaw range of hungry predators.
<h1 class = "pgc-h-arrow-right" >4, the green heron throws its leaves or branches into the water as bait</h1>
The green heron is one of the few tools in the world that uses birds. They often make bait out of shells, insects and feathers, throwing them on the surface of the water to lure small fish. When the bait is thrown on the surface of the water, they will stare still, and as soon as a fish approaches, they will catch them at a very fast speed.
<h1 class = "pgc-h-arrow-right" >5, jellyfish have no blood and no heart</h1>
Jellyfish are one of the oldest multicellular animals on Earth, and most amazingly, they don't have hearts, lungs, or brains either. So, how do jellyfish live without these vital organs? In fact, their skin is so thin that they can absorb oxygen through it, so they don't need lungs. They don't have any blood, so they don't need a heart to draw blood. Moreover, they respond to changes in their surrounding environment through touch-sensitive neural network signals from the neural networks beneath the surrounding epidermis (the outer layers of the skin), so they don't need a brain to process complex thoughts.
<h1 class= "pgc-h-arrow-right" >6, hippos' skin releases a red liquid to protect itself from sunburn</h1>
One study showed that hippos could stand in the scorching sun all day without sunburn, and researchers now know why: This red glandular secretion, called "hippo sweat," contains microscopic structures that scatter light and protect heavy mammals from burns.
<h1 class= "pgc-h-arrow-right" >7, crows and ravens are the most intelligent birds on Earth</h1>
Many scientists believe that the crow family, including crows and ravens, may be one of the most intelligent animals on earth. In addition to being able to make custom tools, crows understand causality, can reason, can count up to 5, have an incredible memory of faces, and can remember if a particular person poses a threat. Mike Goughn, a biologist in National Geographic, said: "Crows are able to recognize human faces. ”
In Israel, wild-crowned small-billed crows actually use bait to catch fish. In Norway and Sweden, fishing lines have been seen dragged out of the water to catch fish. They are second only to humans in intelligence and are even smarter than apes in some research tests. More interestingly, their brain-to-body ratio is similar to that of great apes.
<h1 class= "pgc-h-arrow-right" >8, koala fingerprints are almost identical to human fingerprints</h1>
If there is a crime in a koala cage in a zoo, even the best detectives may be confused. Because their fingerprints are almost identical to those of humans. Even careful analysis under the microscope cannot easily distinguish the lines on koala fingers from the fingerprints of our hands.
<h1 class = "pgc-h-arrow-right" >9, the praying mantis has an ear between its legs</h1>
Neural recordings show that the auditory system responds primarily to ultrasound between 25 and 45 hertz, with a threshold of 55 to 60 decibels. Other insects with auditory eardrums have paired, laterally placed ears. The praying mantis has only one ear located on the mid-abdominal line between the hind breast and legs. When stimulated by ultrasonic pulses, certain praying mantises suddenly and significantly change their flight path, in this way they can know if bats are present and avoid being preyed upon by them.
< h1 class= "pgc-h-arrow-right" >10, bears slow their pulse and metabolism when they hibernate</h1>
Bear hibernation usually lasts about 6 months, during which time certain species, such as black bears, can lower their heart rate from 55 beats per minute to just 9 beats, reducing their metabolic rate by up to 53%, and they usually do not go to the toilet during these times.
However, while studying how bears hibernate, the researchers found a large amount of unknown substances in the bear's intestines. They act like plugs that prevent bears from defecating. At the time, they thought the plugs were made from bears that ate tons of plant material, bear hair, and other indigestible things.
Later studies found that the bears did not really diet to create fecal blockages. Instead, during hibernation, intestinal secretions and cells continue to drain, and even if the bear has nothing to eat, it will produce this plug-like feces.
Fecal plugs are just feces that remain in the intestine, and the intestinal wall absorbs the fluid in the intestine, making it dry and hard. That is, the rate at which the body breaks down the basic elements of the desired food becomes slower, and during hibernation, all the food that the bear takes from the stomach accumulates in the intestines.
How many of these trivia have you heard of?