Seeing the colorful chameleon hiding behind the leaves, the tourists gradually dispersed to see other animals.

Daigo looked at the chameleon's half-body exposed outside the leaves, touched his chin and thought, "Hey, doesn't the chameleon change the color of its body with the environment?" Inside this box is a brown trunk and green leaves, why does its body turn red and yellow? There's still blue on the body, how did you make it? ”

Lin Hao shook his head a little puzzled, indicating that he didn't know very well.

There are relatively few popular science display boards in the climbing hall, because there are a lot of animals here, except for key animals like giant salamanders, and there are no specific display boards for each animal, that is, with pictures of animals and places of origin below, a brief introduction.

The popular science display board is generally located at the corner of the corridor of the exhibition hall, mainly to introduce a certain type of animal!

Lily's visit is more leisurely, unlike the two of them who have to take a look at each of the exhibition boxes, the kind of gray and rustic lizard turtle doesn't look at much, only the animals with a relatively high appearance and beautiful appearance She will appreciate it carefully for a long time.

At this time, he had already walked to the front, greeted the two of them softly, and pointed to a sign in front of him: "Hey, look, here is an introduction to the reason for the chameleon's discoloration!" ”

The signage starts with two interesting questions!

If you put a chameleon on a neon sign that keeps changing color, will the chameleon keep changing color and eventually die of exhaustion?

If you throw a handful of colorful skittles at a chameleon, what color will it become?

Dawu was suddenly shocked: ", this is a question that people can come up with?" Chameleon-loving people strongly condemn neon signs and Skittles! ”

Lin Hao couldn't help but complain: "Chameleon said, I may not be human, but you are real dogs!" ”

I didn't rush to look down at the reason, but thought about it for myself first.

The first question should be whether it will be, if you really want to keep changing color and die, it is not exhausting or stupid.

Throwing a Skittles, is it a random change to a certain color? Or is it constantly changing colors?

However, this idea was quickly rejected by him, because he had just seen an example of a chameleon changing color, and it was clear that the trunks and green leaves in the exhibition box had turned red and yellow, which had nothing to do with the environment!

According to the sign, there are two sources of color formation in the biological world, including pigment color and structural color!

Pigment color is the absorption and reflection of visible light by chemical substances in certain wavelength bands, while structural color is the color produced by the action of physical structures, such as a rainbow on a disc.

In the early days, it was believed that the change in body color of chameleons was due to the stimulation of the external environment, which led to changes in the distribution of pigment cell particles on the body surface, and then changes in body color. But now research has found that many chameleons actually do not have green pigment in their bodies.

So why is it green? This is because the chameleon has a layer of rainbow cells under the surface pigment cells, which contain nanoscale crystals arranged in a triangular grid, and this crystal is the key factor in the discoloration.

When the chameleon is relaxed, the crystals in the rainbow cells are tightly packed to reflect blue light, which makes the chameleon appear green through the yellow pigmented epidermis.

When the mood is stressed, the crystals are widened and longer wavelengths of light are reflected, causing the chameleon's body color to vary from yellow to red.

Therefore, the body color of the chameleon in the human eye is the interweaving of the chemical color of the cytochrome on the surface of the body and the structural color formed by the reflection of the rainbow cell layer.

In general, males have bright and eye-catching colors in chameleons, and females are much inferior, which is because the rainbow cells in the upper layer of males are more developed.

Therefore, the chameleon changes color mainly to express emotions and transmit signals, which is equivalent to the language of communication between them!

"I see!"

Lin Hao suddenly realized after reading the exhibition card.

Think about the problem mentioned at the beginning of the sign, the neon sign changes color, and the chameleon lying on it is just indifferent to keep green?

The colorful chameleon just now is probably nervous because the tourists are looking at it, so it turns red and yellow, and hides behind the leaves.

After understanding this knowledge, look back at the display box of the colorful chameleon from before.

This will cause the tourists to disperse and climb out from behind the leaves, restoring a serene blue-green color.

Lin Hao had a wonderful feeling in his heart, just now he was just admiring its rainbow-like and beautiful appearance, and now he could suddenly feel its mood.

It can really be said that it is an animal that is "moody and colorful"!

I couldn't help but say to Daigo: "Actually, I wasn't particularly interested in visiting today, I thought reptiles were cold and boring, but now my impression has changed a bit, and it seems to be quite interesting to look at them!" I'm a little bit tempted to raise a chameleon. ”

Daigo laughed and said, "Yes! In particular, the environment of the pavilion is fantastic, and I think it is interesting to see anything in such a beautiful pavilion. ”

Lizards, tortoises, chameleons, frogs, snakes, and animals of various types and environments are mixed, after all, in the eyes of ordinary tourists, it does not look very different, and if a type is only kept in one area, you will feel visual fatigue when you stroll.

In this way, you can mix it up and keep the experience as fresh as possible.

Walking around, Lin Hao was attracted by the snake in a large exhibition box again.

The display box has a rich layer of green vegetation, some bright green mosses and ferns at the bottom, and there are a few drops of dew on the leaves on the wall behind it, as if it has just rained, and a feeling of wetness comes to the face.

It's as if in the exhibition box, a corner of the tropical rainforest has been captured!

Several sunken trees are placed in a very stylish manner, and a green python is entwined around a horizontal trunk that is slightly higher than the tourist's line of sight.

It is not so much a winding as a drooping, and it is shaped in the shape of a "U" with two layers nested outward, and the head is placed in the middle of the "U" figure, and the tail is not visible.

In the white eyes, there is a thin black line, which should be the pupils of the green tree python, which looks like it is about to break, and it looks like it is sleeping.

On the neatly arranged small scales, there are some clear and crystalline water droplets, which are as verdant as young bamboos that have just been rained, which is very beautiful!

"What a beautiful snake!"

Lin Hao was once again amazed, leaning over to look at the label below.

The green tree python, native to Australia and other places, is an arboreal small python!

Adults generally do not exceed 1.8 meters.

A family of three passed by, and the little boy stared at the green tree python, and said happily: "Ma Ma, look, this snake is so beautiful!" ”

Mom looked scared and took Dad's hand: "Eh, don't let me look at snakes, I can't see snakes anymore, I'm scared to death." ”

Lin Hao admired it for a while, and when he saw that the green tree python was sleeping soundly, he didn't move, and continued to look at other animals.

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