Why do quail eggs always have black spots on their shells?

There is an opinion that it is a protective color.

Experiments conducted by scientists have shown that the vast majority of female quails choose to lay eggs in a way that matches the spots on the surface of their eggs. Lay eggs in places close to the color of the environment, so that they blend in with the surrounding environment, it is difficult for eaters to notice. On the other hand, quails with few spots on the surface of their eggs will choose a lighter background to lay their eggs to match the overall main color of their eggs to avoid predators.

Eggshells are formed by calcium carbonate deposition in the uterus, where tiny dots of calcium deposition first appear on the inner eggshell membrane coated with egg white yolk, and then gradually accumulate into intact eggshells. In addition to the common white eggshells, the uterine epithelium of different birds can also secrete pigments such as ovioporphyrins, forming a uniform blue, green, brown and other eggshell background colors. The spots on the surface of the eggshell are the deposition of pigments secreted by the walls of the fallopian tubes on calcium carbonate.

As the egg slowly descends along the fallopian tube, the pigment attaches to the eggshell to form spots; If the egg rotates inside the fallopian tube, the pigment drags streaks on the surface of the egg.

Factors for quail eggs to grow spots.

In addition to being genetically controlled by the color and markings of the eggshell, they are also closely related to the physiological condition of the mother bird. For example, the content of coloring substances in the feed, the "stress" caused by the frightening of the mother, the impairment of the dying function of the fallopian tubes due to diseases, and the use of certain chemical drugs to interfere with the formation of porphyrins will affect the background color and markings of the eggs.

Probably for survival, spotted eggs are easier to camouflage, more like a protective color, living in grass or bushes, feeding on grass seeds and plant fruits. There are many natural enemies, and in order to protect the survival of eggs, the protective color has evolved.

Spots of the eggshell are pigments that feel ripe after conception. What is not spotted, or that is easily washed off is a fake artificial fake egg, I wish you good health.

Normal.

The eggshell is generally formed inside the womb of the female quail, and the calcium carbonate in the uterus is **.

and the spots on the surface of the eggshell are later leading to the cloaca.

process, fallopian tubes.

The pigment secreted by the wall of the fallopian tube at the end is deposited on the eggshell.

So we see every quail egg.

They are all different. It is normal for pigmentation to be washed off with water, and it does not mean that the egg is fake.

How to clean quail eggs

1. Soak in warm water.

First of all, you need to soak the quail eggs in warm water prepared in advance for a few minutes, this operation can effectively remove the dirt on the surface of the quail eggs. At the same time, at high temperatures, the pigment on the surface of quail eggs can also fall off, and it can be gently wiped with a rag at this time.

2. Add some vinegar.

Sometimes some quail eggs are soaked in warm water, the dirt on the surface is still more difficult to remove, at this time, you can drip a few points of vinegar into the warm water, which can effectively remove these difficult spots or stains.

The spots on the surface of quail eggs can be removed because these spots are pigment deposits that adhere to the eggshell when the egg leaves the mother, which is an acquired substance, so it can be easily removed after soaking in warm water and vinegar.

Let's take a look at the causes of the formation of spots on quail eggs:

The spots on the surface of the eggshell are the deposition of pigments secreted by the walls of the fallopian tubes on calcium carbonate. ShouxiaoWhen the egg slowly descends along the fallopian tube, the pigment attaches to the eggshell to form spots; If the egg rotates inside the fallopian tube, the pigment will drag the celery on the surface of the egg to create streaks.

Since it is pigment attachment, then first:

1. This is not poisonous and does not affect the consumption of quail eggs.

2. The markings of the eggshell can be washed off, indicating that the pigment and calcium carbonate and the adhesion of the egg shell membrane are not strong enough.

1. Pigmentation.

The female quail will form an eggshell in the womb, which is formed by the slow deposition of calcium carbonate in the uterus, as the egg slowly descends. The wall of the fallopian tube at the end of the fallopian tube secretes a tan-like pigment that adheres to the eggshell to form spots.

Second, a cover mechanism.

Due to evolution, eggshells are less likely to be spotted with spots, which is a protective mechanism caused by evolution.

1 Pigmentation formed in the quail's body.

Under normal circumstances, the female quail will form an eggshell in the uterus, which is slowly deposited by the calcium carbonate in the uterus, and the female quail usually forms a hard eggshell in the oviduct about 4-5 hours before laying the egg, and in the process of the egg slowly descending, the oviduct wall at the end of the oviduct will secrete a similar tan pigment, which adheres to the eggshell to form spots, and the shape of the color spots on each quail egg will be different, depending on the direction and number of rotation of the quail egg in the oviduct.

2. Spotted quail eggs can be eaten after being shelled.

The shell of quail eggs generally has spots, which is a normal phenomenon, and usually when eating quail eggs, the shell will be peeled off before eating, if you are worried that the quail eggs have spots and can not be eaten, you can choose to wash them off, the spots on the quail eggs are only pigmentation, which will not affect the edible, so no matter whether the quail Heng Xun Qiao egg is long or not speckled, it will not affect the food.

3. Soak in water and scrub.

If you want to wash the markings on the eggshell, you can put the quail eggs into a basin, pour an appropriate amount of warm water, soak them for a few minutes, and gently wipe them off with a cloth. Because the spots on the surface of quail eggs are pigmented, they can be removed by soaking them in water for a long time or by heating them at high temperatures.

4. There will be no spots.

The main ingredients in quail eggs are protein, vitamins, and multi-clock mineral elements, rich in nutritional value, proper consumption is beneficial to the body, generally will not have adverse effects, and if a large amount of consumption, it may only cause obesity, and will not lead to spots on the face, and the factors of spots are more complex, if there are spots after eating quail, it may be caused by their own reasons.

Hello, glad to answer for you: this may be due to the fact that the quail eggs are not fully cooked or have been stored for too long, causing the yolk to oxidize and turn black. It is recommended to add some salt or white vinegar to help the shells peel off more easily when boiling quail eggs, and to eat them in time after cooking.

If the eggshell is peeled off, the egg is buried black, and it is best not to eat it, so as not to affect health.

Can quail eggs be stored in the refrigerator.

Yes, quail eggs can be stored in the refrigerator. Quail eggs that are kept fresh in the refrigerator can be kept fresh for a longer period of time, usually for about 2-3 weeks. When storing quail eggs, you can place them in an airtight container to prevent odors and moisture from entering the inside of the quail eggs.

It is important to note that the shell of quail eggs should be cleaned before storing them to avoid bacteria entering the inside of the eggshell and causing spoilage. At the same time, when refrigerating quail eggs, it is also necessary to avoid mixing them with other foods to avoid contamination.

There are black spots on the inside of the eggshell, which are due to bacteria attaching to it. The freshness of such eggs has decreased, which has a certain impact on human health, and it is recommended not to eat them.

There are many pores on the outer shell of the egg, through which bacteria and mold can enter the inside of the egg. Black spots appear on the inner wall of the eggshell, but the yolk and egg white are not broken, also because the mold enters the shell through the stomata and destroys the shell membrane in the shell, and the mold grows and gathers into black spots. Some eggs are exposed to rain or moisture, which will damage the protective film on the surface of the eggshell, and will also cause bacteria to invade the inner surface of the egg and become moldy and deteriorate.

Although such eggs do not have obvious symptoms of spoilage on the surface, the quality of the eggs has actually deteriorated, and it is not recommended to eat them.

Pigmentation formed in the body of quail.

In general, female quails will form eggshells in the uterus, which are formed by the slow deposition of calcium carbonate in the uterus, while female quails usually form a hard eggshell in the oviduct about 4-5 hours before laying eggs, and the eggs slowly descend as they descend.

The wall of the fallopian tube at the end of the fallopian tube will secrete a tan pigment that adheres to the eggshell to form spots, and the shape of the spots on each quail egg will be different, depending on the direction and number of rotations of the quail egg in the fallopian tube.

The spots are bird droppings, and the vinegar is easy to wash off, why are they so stupid and not found.

It must have something to do with the pigment in the quail's body, and it has evolved over a long period of time, which is not what Darwin said. "Eggs" are the most important thing.

Because the size without spots is so obvious, it is found and eaten by other animals, and the eggs with spots are not easy to find in that environment like camouflage uniforms, so the eggs with spots survive.

Quail eggs are not fresh after a long time, and there are black spots when they are cooked, so try to eat less or not eat them.

Therefore, the time to boil eggs should not be too long, generally 5-8 minutes is the best, and do not put the eggs directly into cold water to cook slowly, the eggshell is easy to crack.

Answer pro Because quail eggs are to avoid some predators, the spots of quail eggs have a certain relationship with the environment. So the spot of quail eggs is not caused by cooking, but plays a protective role. Therefore, raw quail eggs will also have this kind of black spots.

These dark spots can also be caused by pigmentation.