Bats are numerous
They are one-fifth of the total number of mammal species in the world. They vary greatly in appearance and size, and are a group of mammals that is second only to rodents in distribution.
The prosperity of bats is not difficult to understand
They are by far the only group of mammals with wings and flight, expanding into a whole new habitat and food source.
Bats belong to the order Pterodactyl, a Latin scientific name for which means to have wings on the arms.
Their wings retain the characteristics of a recognizable hand: with one thumb and four other fingers.
If human fingers look like bats, they will reach 2 meters in length and be thinner than sweater needles.
The 900 species of bats can be divided into two categories: large bats and small bats.
Large bats feed on tropical fruits, while larger numbers of smaller bats mostly have echo localization systems.
A small bat emits an average of 400,000 ultrasound signals a night, and these "calls" have been measured to reach 110 decibels, which is higher than the music of ordinary rock bands, but because the frequency is too high, humans cannot hear it.
Each time the bat flaps its wings, it closes its ears, thus protecting its ears from being shattered by the ultrasonic waves emitted.
Bats also use the power generated by the flapping of their wings to inject air currents into their throats to produce vibrations, so that the three of flapping wings, emitting ultrasonic signals and protecting the ears are perfectly combined and very harmonious.
Each ultrasonic signal emitted enables the bat to determine the location, size, orientation of the target object, and even detect the hardness of the object. This echolocation system is very accurate, and can detect a single line in a spider's web from a distance of 1 meter.
Once the predatory target is locked, the ultrasonic frequency quickly increases, putting it into a state of attack.
The largest known group of mammals is the 50 million Mexican American Dog Bats that live together in the same cave, and their nocturnal activity begins in the afternoon so that the bats in the entire cave can leave.
In the "nursery" in the bat cave, there are more than 16,000 bat cubs per square meter, but bat mothers are still able to accurately find their children to feed through sounds and smells.
Female bats complete conception during hibernation.
When the female bat is asleep, start preparing, let the wandering male bat caress and make love to them, and complete the mating. The sperm injected into the female bat will survive until the end of the spring hibernation, and the eggs in the female bat will eventually be fertilized after waking up.
Bats spend an hour grooming themselves a day, using the oil secreted by the glands of their faces to massage their wings to keep them moist and soft.
Bats can live up to 30 years
Vampire bats feed mainly on cows, horses, tapirs and turkeys.
If they suck human blood, they usually start with the thumb of the foot, not the neck, and can only suck two tablespoons of blood at a time. Vampire bats are the only mammals that feed exclusively on blood. Because blood is a low-energy food, a vampire bat will die if it can't find food for two consecutive nights.
To avoid this danger, they have evolved a sophisticated and complex system in which adult female bats can feed each other. They can even clearly remember who has helped them and thus prioritize giving back to the other person.
The economic value of bats
A blood-thinning drug called a "natural coagulation factor inhibitor" is extracted and refined from the saliva of vampire bats and used to treat patients with heart disease and stroke.
Bat dung is a valuable fertilizer and a source of sodium nitrate used to make gunpowder.
Bat feces are highly nutritious, with 100 grams of feces containing more protein than a McDonald's Jumbo hamburger.