Why can t sparrows walk? Why do sparrows jump and walk

Hehe, because of the long-term evolution of these birds, all the unnecessary degradation, because it mainly relies on flying and does not need to walk, so there is no need to grow these joints and limbs, only jump and not walk. Just like chickens and ostriches, and penguins, they don't fly anymore for various reasons, and they need to move on land or water, so they become very fast and swim well.

Almost all bird bones are "hollow bones", which reduces the weight of the flight and also reduces the bone density, and generally small individual birds use "jumping" because their own weight can be bounced to the ground.

The reason why sparrows can only jump.

This is because the limbs of a sparrow are short, consisting of parts such as the thighs, shins, tarsus, and toes, and the entire hind limb muscles are distributed in the thighs and shins, and the rest of the body is full of tendons. These tendons run through the toes and control the curvature of the toes, allowing the sparrow to hold on to the branches.

However, there is no articular between the tibial tarsal and the phalanges of the tarsal part of the hind limbs of the sparrow, so the joints between the tibia and the tarsal bone cannot be flexed, which makes the sparrow unable to walk on flat ground, but can only jump quickly and frequently.

Sparrows are birds that are associated with humans and prefer to live around settlements and fields, and use the crevices of buildings as nesting sites.

There is also such a legend about the sparrow that will not walk, but will only jump in the folk, saying that because the sparrow likes to steal food, he actually broke ground on the head of Tai Sui and stole the food of the king of heaven, and was shackled by God, so he could only jump.

In fact, sparrows are indeed ill-fated. Because they often eat grain in groups during the grain harvest season, sparrows were listed as one of the four pests for a long time after the founding of the People's Republic of China, and they were wanted by the whole country. In the cities and villages, gongs and drums were beaten everywhere to prevent the sparrows from falling to the ground, so that many sparrows were so tired that they fell to the ground and died.

Although the sparrow is no longer one of the four pests, in recent years, due to the improvement of people's living standards, civil buildings across the country have undergone great changes, and the nesting sites that sparrows can choose are becoming fewer and fewer, coupled with some other reasons, the number of sparrows has declined sharply. The life of a sparrow is still hard.

Because the joints between the tibia and tarsal bones of the sparrow cannot be bent. The hind limbs of birds are composed of the thighs, shins, tarsus, and toes, and the entire hind limb muscles are distributed in the thighs and shins, and the rest of the body is full of tendons. In the process of evolution, the lower knee joint of the sparrow degenerated, and there was no articular between the tibial tarsal and the tarsal phalanges of the hind limbs, and the joints between the tibial and tarsal bones could not be bent, so the sparrow allowed Qiaoye to only jump and walk.

Because the joints between the tibia and tarsal bones of the sparrow cannot be bent. The hind limbs of birds are composed of the thighs, shins, tarsus and toes, and the entire hindlimb muscles are distributed in the thighs and tibia, and the rest of the parts are all tendons. In the process of evolution, the lower knee joint of the sparrow degenerated, and there was no articular between the tibial tarsal and tarsal phalanges of the hind limbs, and the joints between the tibia and tarsal bones could not be bent, therefore, the sparrow could only jump and walk.

Although Mr. Sun's answer in high school sounds very professional, if you look closely, you will find that this statement is wrong. Because sparrows can walk in stride. This explanation talks about "missing joints", and although many technical terms are used, these terms are wrong.

The tibia and tarsal bones mentioned therein are called tibial tarsus and tarsometatarsal in ornithology. Even the nouns are written incorrectly, how can people believe it? There are also some scientists who believe that sparrows like to jump and walk, which is caused by their living environment.

The ancestors of the sparrow would certainly have taken a step, and the sparrow belongs to the passerine order. Passerines are a very young group of birds that evolved relatively late, and the more primitive birds are ostriches, ducks and chickens. They all walked, which suggests that the early birds must have walked as well.

When it evolved into a small bird such as a sparrow, they began to jump and walk, Mr. Zhang Chenliang once thought, it may be because the sparrow often lives in the tree, there are many branches on the tree, it has to jump between the branches, because it is small, short legs, can only jump with both feet, grab another branch together, after a long time, the sparrow is used to jumping between the branches, when it comes to the ground to forage, it also jumps and walks. (Excerpt from the interesting bird paradise with Mr. Xiaoliang's naturalist class.) It is advisable to buy and read the entire set of books.

Buy online))).