Why can t frogs see things that don t move?

If it is a breeding as a mammoth.

It's best to consult an expert to figure out exactly what kind of frog it is, and then you can "prescribe the right medicine". The habits of different frogs are quite different!

If it is indeed bullfrogs, then they certainly do not eat bread worms. Bullfrogs are more "greedy" and prefer to eat larger foods than insects, such as smaller frogs, small fish, small shrimp and even chicks! It is recommended to get some live shrimp, small fish or loaches and put them in a large pot, and then put the bullfrog in it, as long as it is hungry, it will eat it by itself.

However, it will most likely not be eaten in front of you, and it will only be eaten when no one is around.

If it's a frog, it depends on which species it is. Some frogs eat all kinds of live bugs, and some only eat flying worms and not worms. Your frog may be a species that only eats flying insects, which will be more difficult to raise.

It is also possible that some frogs have the habit of eating one type of food and will not eat other kinds of food. If this is the case with your frog, then you will have to catch many different insects and try them until you find the one they like to eat, which is very troublesome, but there are many animal husbandry enthusiasts who often have this experience and have to prepare their own minds.

Frogs eat flies and other pests, it should be noted that the food must be alive, lying there without moving the frog will not eat, if you can't catch it alive, you can tie a rope to the insect and dangle it in front of it, he still eats

Hello and glad to ask questions for you! This passage is excerpted from the original sentence of Science magazine....

The eyes of a frog are different from the eyes of ordinary animals, they are designed to look at moving objects. The moth and the fly do not react to the frog's eyes, but as soon as the moth moves, the frog will immediately spot it and jump up to prey on it according to its flight direction and speed. It's no wonder that some zoologists joke that frogs like to eat flies, but that frogs can starve to death if they sit in a pile of dead flies.

The frog's eyes also have a special ability to recognize different images. It can instantly identify its favorite flies among the various shapes of flying critters, while the background of the flying critters is not responsive to the frog's eyes.

In other words, the frog's eye is not like a camera, it can take pictures of everything in front of the lens without missing anything, and it only sees the things that are useful to it.

Frogeye can quickly spot moving targets, quickly determine the target's position, direction of movement and speed, and immediately select the best attack posture and attack time. A frog's eye is not something that cannot be seen or moved, but is particularly noticeable to moving objects. Biomimicists have long paid attention to the study of frog eyes, and they have found that the nerve cells of the retina of frog eyes are divided into five categories, one only responds to color, and the remaining four types only respond to a certain feature of the moving target, and can identify and select the kind of features that they can see, and send them to the visual center of the brain - the optic parietal cover.

On the optic parietal cover, nerve cells are divided into four layers from top to bottom, and the first layer responds to the contrast of the moving target, and can extract the features of the dark anterior and posterior edges of the target; The second layer can extract the convex edge of the moving target; The third layer only sees the perimeter edge of the moving target;

In the fourth layer, only the dark front of the moving target is seen as a dark change. These four layers of features are like drawings drawn on four sheets of transparent paper, stacked on top of each other to form a complete image. This physiological structure is good at breaking down complex images into several easily discernible features, which of course improves the agility and accuracy of target discovery.

It is not difficult to see that the frogeye not only presents the objects it sees on the retina, but also analyzes the images of the objects it sees and picks out useful image features to "report" to the brain. Hope it helps you and thank you!

Frogs are not completely blind to still lifes, but their eyes are different from those of humans and have different adaptations and strengths. Stool digging socks.

The eyes of frogs do not automatically adjust their focus to observe objects at different distances like humans do. On the contrary, their eyes have the advantage of seeing objects clearly in the water, making them suitable for swimming in the water. Their pupils are also comparatively larger than those of humans, allowing them to receive light better.

In addition, frogs' eyes are sideways and scattered, that is, they can see things on both sides at the same time, but they have a hard time seeing objects in front of them, especially when they are not moving. This is because the frog's eyes are adapted to track moving objects, which is very useful when hunting.

In summary, frogs' eyes have the advantage of seeing objects clearly in water and tracking moving objects, but their eyesight is not particularly suitable for observing static objects relative to humans.

The frog has a great ability to catch insects, and when a small flying insect flies in front of its eyes, it jumps up and can always catch the insect accurately. But strangely, the bulging eyes of frog eyes are "blind" to still thingsEven if a fly stops in front of you, it won't go unnoticed.

Scientists have studied the structure of the frog's eye and found that there are four types of nerve cells in it, that is, four "barrier detectors", which vary in shape, size, and dendritic branches, and each cell receives a different range of signals and conducts signals at different speeds.

The first type of nerve cell is called the anti-locust creep detector, which can sense the lead slag on the dark front and back edges of the motor target; The second is called the Motion Convex Edge Detector, which reacts to the convex edge of a dark-colored target with a contour; The third type is called the edge detector, which is the most sensitive to the edges of stationary and moving objects; The fourth type is called the dimming detector, which reacts immediately as soon as the intensity of the light decreases. Under the action of these four nerve cells, frogs can decompose a complex image into several easily identifiable features, and then transmit them to the visual center of the brain, and after synthesis, the original complete image can be seen.

Categories: Science & Engineering.

Problem Description: Movement is relative.

Is it possible to see people standing still when it is jumping?

Resolution: It should be:

The frog's eyes are sensitive to things that move, but they are indifferent to things that don't move.

What are the structural characteristics of the frog's eyes that give frogs such strange abilities? After in-depth research, scientists have found that the retina of frog eyes is composed of three layers of cells: the photoreceptor cell layer, the intermediate contact cell layer, and the ganglion cell layer.

The photoreceptor cells in the first layer convert images of external objects into images on the retina and convert the images into electrical nerve signals. The second layer of contact cells is responsible for transmitting electrical signals to the third layer; The third layer of ganglion cells detects image features and codes these electrical signals to the brain.

Ganglion cells are further divided into four categories, each of which performs a specific detection function and only responds to a certain feature of the motor file target, identifying and extracting different features of the retinal image. In this way, a complex image is broken down into several easily recognizable features, improving the speed and accuracy of target discovery and identification. Therefore, scientists call these four types of ganglion cells "detectors", which are "edge detectors", "convex edge detectors" (also called "insect detectors"), contrast detectors, and "dimming detectors".

Together, these four detectors allow the frog to respond only to the objects that are critical to its survival.

The edge detector only reacts to the edges of the surrounding light or dark scenes; The convex edge detector only reacts to the curved convex edge of the scene that moves like an insect; contrast detector, which only reacts to changes in brightness; The Variable Signom Detector, on the other hand, only reacts to the decrease in light intensity, i.e., shadows. Taken together, the frog's eyes are particularly sensitive to both "fast-moving objects with rounded fronts" – insects that it likes to eat, and predators that are "fast-moving with large shadows". It does not respond to things that have no meaning to its existence, such as trees and blades of grass that do not move or shake.

It is not difficult to see that the frog's eye plays a role far beyond the scope of the camera that captures the scene without leaking a bit. The frog's eye can not only present images of the objects seen on the retina, but also analyze the images it sees, pick out specific image features, and then "communicate" to the brain through the optic nerve.

After the "meticulous carving" of nature, this visual inspection system of frog eye has reached a very perfect point. The frog's eye does not react to the background, instead focusing on objects that move relative to the background and have specific morphological characteristics. As soon as the "shadow" of an insect or predator passes in front of its eyes, it immediately reacts by pounceing on food or escaping into the water.

In other words, the frog's eye sees only what is meaningful to its survival. For example, the natural predators of movement and food are very important to its survival, and the pond is its habitat and is a meaningful sight for its survival. This characteristic of the frog's visual organ provides a design principle and model for the "moving target detector".