Any interesting facts about biology? Or strange things that few people have heard of

Once I went to Changchun to run errands, a car accident at an intersection ran over a puppy, and the other puppy has been sniffing around with his companions and refusing to go, not counting pedestrians approaching, very touching.

Alien species cannot be released. (Fish eggs are poisonous).

Lepisosteidae is a fish of the genus Atractosteus.

Commonly known as alligator gar, crocodile , rocket.

The body of the crocodile is covered with a diamond-shaped glaze of hard phosphorus, as if wearing steel armor. Females are slightly larger than males and are the largest of the gar in existence. The body of the fish is long and cylindrical, densely covered with blue-gray diamond-shaped scales, with dark black markings, the snout is protruding, and the upper and lower jaws are densely covered with sharp teeth, resembling a crocodile's mouth, hence the name.

Unlike most of their close relatives, crocodiles breathe air and can survive up to two hours without water.

Proteidae Necturus amphibians.

The picture below shows Necturus maculosus

It was named because it was mistakenly thought to be able to bark like a puppy"Mud puppy"。Gray or brown with sparse light black spots. The caudal fin is reddish-yellow. head and trunk flattened; Tail flattened. The appendages are short and have four toes. 3 pairs of bright red outer gills are retained for life.

<> is native to eastern North America and has been in the water almost all their lives.

Our world is a vibrant, fascinating one. Flowers, birds, insects, fish, birds and animals are an indispensable part of this world. Today, we're going to talk about that part.

Some people ask if the horse sleeps standing up. Horses sleep standing up, and horses sleeping standing inherit the habits of wild horses. Wild horses live in the endless desert steppe areas, and in ancient times they were both hunting objects for humans and a delicacy for carnivores such as jackals and wolves.

Unlike cattle and sheep, which can fight with their horns, the only way is to run to escape the enemy. Carnivores such as jackals and wolves are nocturnal, and they live in hidden bushes or burrows in earth and rock during the day, and come out to hunt at night. In order to escape from the predators quickly and in time, the wild horse does not dare to sleep on the ground at night, and even during the day, it has to stand and nap, maintaining a high level of vigilance in case of accidents.

Although domestic horses do not encounter natural predators and man-made injuries like wild horses, they are domesticated from wild horses, so the habit of wild horses to sleep standing is still preserved to this day.

There are also people who don't know whether cicadas and grasshoppers have ears, but they do have ears, and the places where the grasshoppers are connected to their hind legs on their flanks. The cicada's are in the middle of the hind legs.

I think there is another question that everyone must be a little puzzled about, that is, whether the fish drink water or not. In fact: fish that live in freshwater do not drink water for the rest of their lives. This is because of the osmotic pressure relationship. But the fish that live in the sea have to drink water.

That's right, our world is a lot of fun, and we're a part of it, but I wonder: is this a problem, and what do you want to ask?

1.Fish don't blink because they don't have eyelids, and biologically speaking, they can't blink without eyelids.

2.Crocodiles don't cry because they're sad, and the so-called crocodile tears are actually crocodiles trying to get rid of excess salt from their bodies.

3.The bird will not be electrocuted when it stands on the wire, because the bird stands on one leg, and the wire does not form a complete circuit, and the current will not flow through the bird's body, so it will not electrocute the bird.

4.Chickens don't eat sand to fill their stomachs.

Don't look at chickens sometimes eat sand, in fact, chickens, like people, can not rely on sand to sustain life, chickens do not have a relatively complete digestive system, must rely on eating sand to digest the food in the stomach, but the sand that chickens eat will not be digested with food, and will be excreted with feces.

5。Live hairtail is not available in the market.

You've ever eaten hairtail, but you've never seen a live hairtail! This is because the hairtail fish belongs to the deep-sea fish species, the pressure in the deep sea is strong, when the hairtail fish ** is fished up, the pressure suddenly decreases, and the lungs of the hairtail fish will expand and die due to the change in pressure, so it is rare to see a live hairtail fish!

6.Bats are blind.

Summer is coming, don't look at the night bats can fly freely in the sky, but in fact, bats do not rely on vision to identify the direction, but rely on ultrasonic wave reflection.

7.Flies don't rub their hands to be clean.

You've definitely seen flies rubbing their hands! But you must be very strange, when did these-eating guys get so clean, in fact, the flies rub their hands, it is indeed to remove the impurities on their hands! But the purpose is definitely different from ours, if the dirt on the hands of flies is not removed in time, the contamination on the feet will accumulate more and more, which will not only affect its flight and crawling, but also make the taste organs on the feet malfunction.

Fish that live in freshwater do not drink water for the rest of their lives. This is because of osmotic pressure. Fish that live in seawater drink water.

Fish have to drink water, but the way is different from people, horses sleep standing up.

Summary. Dear, 1The strongest and most powerful muscle in the human body is the tongue 2It is impossible to open your eyes and sneeze 3It is impossible to kill yourself by holding your breath.

Dear, 1The strongest and most powerful muscle in the human body is the tongue 2It is impossible to open your eyes and sneeze 3It is impossible to kill yourself by holding your breath.

The sleeping shark is known for its ugly appearance and slow movements, living in the deep sea for kilometers and about 7 meters long, which is larger than the great white shark.

The multicolored eel is a male and female variant that is black when it is young, and the male becomes blue when it grows a little longer, or the male grows a little longer and becomes blue-yellow, and the hermaphrodite grows a little longer and the yellow female.