Why is it the fastest recorded legged animal to turn around?

The spider clings to the ground, determines the direction of the prey through the turbulence of the air current, and then quickly bends its "long legs" to complete the predatory behavior. Each leg is oriented in a different direction, 360 degrees without dead angles, and can quickly turn the prey no matter which angle it comes from. The leg closest to the prey anchors the ground as a fulcrum, dragging the torso towards the prey, while the distal legs push off the ground, so that the two forces of pushing and pulling produce a rotational force; Next, the spider acts like a figure skater, tightening its other off-the-ground legs to reduce wind resistance, increase spin speed, and accurately turn its mouth in front of its prey.

According to the researchers, the spider spins extremely fast, at the same level as aerial spinners such as hummingbirds and fruit flies.

It is found in many places in the Americas, Africa, and Asia. According to one of the authors, Sarah Cruise, only half of the spiders weave webs to catch their prey, some stalk their prey to attack, and some "sit and wait" to ambush their prey, and the Pseudonym spider belongs to the latter.

The body length of the female is 10 mm, the body color of the female spider is yellowish-brown, the abdomen is oval, flattened, and the ventral dorsal has a black-brown midline, and there is still a transverse markings at the middle and posterior, and each foot has grayish-white spots. This species is distributed in the northern mountainous areas, often inhabits the bark or corners of trees, does not form webs, and feeds on small insects, and female spiders have the behavior of protecting eggs.

The female is about 15 mm long; dorsal armor mm long, mm wide; The abdomen is millimeters long and millimeters wide. The ratio of the anterior middle eye to the posterior middle eye is 1. There are 3 dorsal spurs on each leg segment, 1 spines on the anterior surface of the 1st i-leg segment, no anterior lateral spine on the first leg segment, and no posterior spine on the posterior surface of all leg segments (1 posterior lateral spine on the right foot leg segment); 2 dorsal spurs in all knee joints; There are 3 pairs of abdominal spines in each of the 1st tibial joints (4 abdominal spines on the anterior surface of the tibial joint of the right step I foot), 2 pairs of abdominal spines in each of the 1st and 2nd tibial joints, 1 pair of abdominal spines in each of the 1st and 2nd posterior tarsal joints, 1 pair of abdominal spines in the 1st and 1st pairs of abdominal spines (2 abdominal spines on the anterior surface of the posterior tarsal segment of the right step foot), and no spines in the tibia and anterior and posterior sides of the tarsal joint.

Foot pose. The feet are brown, the dark rings on each node are not clear, and it is vaguely distinguishable that there is a dark ring on the leg joint, a very wide ring on the knee and tibia, and a dark brown on the posterior tarsal joint. Other features are the same as that of the pouch flattened spider.

The body of the male spider is about 13 mm long, the dorsal carapace is mm long and wide, and the abdomen is mm long and mm wide. The body shape is similar to that of a female spider, and the body color is lighter than that of a female spider. The tibial joints of the tentacles have a scaphoid protrusion, which is thick, broad, short, concave in the middle, and has a small protrusion with dark black margins at each end, all thumb-shaped, and the dorsal ones are slightly larger than the ventral ones.

Foot pose.

The spider is the fastest land animal to turn on its legs, and it can turn three times in the blink of an eye.

The structure of the legs of the spider makes it the fastest legged animal.

They have long legs with a special joint structure. Each leg has two body lengths.

The result of natural evolution, coupled with the advantages of body structure.

Natural selection is the best decision for it.

Because it is the abilities that nature has given him that makes it the fastest.

Your own talent, nature's fairness.

Because nature has given it this ability, it has become the fastest legged animal.

In order to facilitate the escape, natural selection, survival of the fittest.

Spiders have a special ability thanks to their long legs with special joint structures. Each leg has two body lengths, and the axis of rotation of the femoral-knee joint is almost perpendicular to the ground. In this way, the toe tarsus has a very large range of motion when it is close to the ground.

As a result of natural selection, the spider turns around very quickly.