9 facts about ducks that make you fall back

People have discovered gold in duck belly. Surprise?

In most people's eyes, ducks are extremely adorable, especially ducklings. However, the following 9 truths reveal things that are very surprising about their behavior and how they evolved.

High alert

Photo: Teh Cute

You rarely make a duck surprise. They are always on high alert. It is difficult for the predator to "sneak" behind the adult duck. The hunter hunter must be extremely immobile while watching the duck shot.

It was proved that some ducks slept with one eye open. If sleeping in groups, some species will sleep in long lines. The end will be in charge of guarding the danger.

A study in 1999 found that the habit of sleeping in ducks was very interesting. When sleeping with one eye, only a hemisphere of the brain is rested, the other half is awake. They have the ability to control the hemisphere.

Reduce blood to the foot membrane

Photo: Listverse.

Duck is a strange bird. They have evolved the body to cope with harsh environments like cold and adaptive habits in the water.

Everyone knows the propeller has swimming membranes, but did you know they easily control the amount of blood circulating down your leg? When the temperature drops, blood will flow less into the two limbs. Therefore, they are not uncomfortable when swimming in cold lake water.

The propeller also changes color when it comes to breeding season. Similar to baboons in Africa, some ducks' legs will turn bright red to be ready for couples. Both the empty propeller and the roof will be in such a state of color until the summer, when they switch back to pale colors in order to blend into the surrounding environment.

Miraculous eyes

Photo: pewit

Ducks own better vision than dogs, do you believe? They can see colors, and thanks to the position of the two sides of the eyes, the angle of view of the duck almost reaches 360 degrees.

Ducks look 2 to 3 times better than humans. Although they do not look good at night, the eye contains cones that humans do not have, and helps the duck to see the UV rays.

They are also naturally given a third eyelid. All birds have 3 eyelids. In ducks, this is a layer of "mucous membrane" that acts as a swimming goggles to improve visibility at duck underwater.

Golden swallowing into the abdomen

Photo: Listverse

Ducks often pick up sharp iron stones, then swallow them. They will follow the esophagus to a second stomach in the abdomen, called a gizzard (most birds have gizzards).

Why does duck swallow rock and gravel? Answer: to crush bones from the fish they swallow. The term used in this case is stomach stones.

But when the stones are no longer sharp enough, the duck will spit out and replace the new ones. If you're lucky, you'll pick up some nice round stones that once "lived" in the duck gizzard.

Occasionally, ducks don't just swallow regular rocks. In many cases, gold miners have actually found gold in duck gizzards or some other birds.

They even followed the ducks to where they picked up the gravel to find the source of the gold. At the time of the gold rush, they picked up duck and bird feces in hopes of finding gold.

It is not happy to be a duckling

Photo: Forbe.

In nature, the proportion of cute ducklings living to adulthood is not high: only 60 percent. Many dangers threaten them.

First of all, there must be extreme weather. Cold prices contribute to killing a large number of ducklings. In addition, loss of habitat also affects their survival rate. The unconscious concrete structures of human-built cities cannot protect ducklings as well as natural habitats.

Next, ducklings are good prey for different carnivorous species. Big fish, turtles easily swallow them from below the water surface. Danger from the sky consists of birds of prey like eagles, storks, pelicans .

The ducklings are completely vulnerable to attack until they reach adulthood (50-70 days old) and improve their flying ability.

Risk of infection from duck manure

Photo: Listverse

The US Department of Disease Control and Prevention warns that duck manure is capable of causing illness to humans, such as E.Coli infection or Salmonella infection. As a result, you will have diarrhea and vomiting, if you don't clean up after contacting ducks (of course).

Known duck manure can carry up to 60 pathogens. Histoplasmosis is a type of respiratory disease spread by a fungus that grows in dry duck manure, causing a risk of death. Be careful when operating or living near many ducks.

The scary reproductive organ of an empty duck

Photo: Patricia Brennan

The duck's penis is shaped like . the opening of the bottle, is kept in a bag underneath the abdomen, and when the penis reaches its erection it will be up to 20 centimeters, nearly a fourth of the duck's length.

It is worth mentioning here that about 97 percent of bird species recorded in the world . do not own a penis and ducks are not among them.

Worse, some empty ducks carry many sharp spines that grow inward. Effect of thorns to hold the penis in the body of a female duck. Are you frightened?

Roof ducks are not "fit" either.

How has the duck duck evolved to combat the "weapon" of an empty duck? It turns out that the egg nozzle of a female duck has a complex structure with many "dead ends" or "fake entrance" to deal with. The duck duck's penis is clockwise, and the duck-shaped duck egg has a counterclockwise spiral.

Roof duck (bottom) and empty duck penis (top).Photo: LiveSciene

Duck species have been recorded to perform forced acts. More horribly, collective coercion is also a common behavior in ducks.

Therefore, the roof duck pussy structure seems to be designed to eliminate situations that they don't like. Fortunately, only 3 percent of the total paired ducks can fully fertilize the ducks.

Violence

If you used to live near natural ducks, you would have witnessed violence between ducks and the same kind. The double season is a dangerous time, especially for female ducks - as mentioned above.

The empty duck tries to drown the drowned opponent.

They are ready to drown their opponents when pairing or fighting for partners. Many female ducks have lost their fur behind their backs due to violent bites from empty ducks, and if bad luck happens, they also suffer eye damage.