Black cars go with white bird droppings, and white cars go with black bird droppings. Is it a coincidence?

Recently the tree has turned green again, and its leaves have grown denser.

If you often walk under trees, you will inevitably win the lottery.

The cars that are often parked in the shade of trees,

Naturally, bird droppings are inevitable.

I don't know if you have observed this.

It seems that the black car is covered with white bird droppings.

The white car was covered with black bird droppings.

Did the bird do that on purpose?

Let's start from the source.

Where does bird poop come from? Bird butts.

Hey, this is nonsense!

To be precise, it's called the cloaca.

An important organ for excretion and reproduction in birds.

You can tell from the name.

(Copyrighted image from the gallery, no permission to reprint)

In episode 336, Rong Ge mentioned this when he was talking about belly buttons.

In fact, our early human embryos also have this structure.

Both from the digestive tract and from the kidneys,

There are rare and dry ones.

That is to say, these things that fell from the sky,

It's likely not just bird poop, but also bird urine.

These mixtures contain large amounts of nitrogen and phosphorus.

That's excellent fertilizer.

Rong Ge remembers there is such a country,

Birds gather on the islands, and the bird droppings are piled up very thickly.

Over time,

Under the combined influence of climate and geographical factors

Rich phosphate deposits were formed.

It really made them a lot of money.

This was also one of the benefits of the Age of Exploration.

The changes brought to European agriculture preceded the Industrial Revolution.

However, bird droppings are good for fertilizer and mineral production.

Wipe it off immediately after getting off the car!

Bird urine in bird excrement composition,

The main component is uric acid.

The main metabolites of human urine

——Urea can be different,

Uric acid is in colloidal form and slightly soluble in water.

To transport 1 gram of urine,

Mammals need 60 ml of water.

Birds only need about 3 ml, which is an extremely high concentration!

Uric acid is excreted from the body as white crystals.

Therefore, the white puddle on the car is bird urine.

The darker ones are food residues.

This is bird shit in the truest sense.

The whiter the bird poop, the higher the uric acid content!

Uric acid is highly acidic.

It is corrosive to car paint.

So bird droppings must be wiped off in time.

What's more, it's hard to wipe off once it dries!

As for the black and white matching phenomenon we mentioned at the beginning,

In fact, more strictly speaking it should be:

Black shit on a white car and white urine on a black car,

The rest of the excrement is similar in color to the car paint.

But what we ignore is just an illusion.

(Copyrighted image from the gallery, no permission to reprint)

Although it is really annoying that birds urinate and defecate randomly,

But for them it is for survival.

In order to fly higher, farther and faster,

Birds embrace minimalism.

Why is other people's urine so concentrated?

They have abandoned their bladders to store urine.

shortened colon,

After the food you eat absorbs nutrients,

The residue can be quickly excreted from the body.

This allows birds to remain as light as possible.

Reduce the weight and adapt to flying.

And landed to find water to drink,

This is obviously a dangerous time.

Must be minimized.

At the same time, they also eat a lot.

To get plenty of protein,

As a sufficient source of energy,

So for birds with straight intestines,

The more you eat, the more you poop!

A bird as big as a pigeon,

I have to defecate and urinate forty to fifty times a day.

And sparrow-sized birds pull more.

Hundreds of times a day!

Otherwise, our cars parked outdoors would have such a high chance of getting infected!

However, among birds, the ostrich is an exception.

Their feces and urine are separate.

It has a urine storage structure similar to the bladder.

But then again,

This guy can’t fly. He can’t!

Otherwise we have to talk about the evolution and existence of everything

That all makes sense and logical!

Source: China Digital Science and Technology Museum