How do spiders climb high in the air without wings?

How do spiders climb high in the air without wings? The spider first climbs to a high place, then slides down (with some silk), glues the silk to a point, and then weaves a web. Spider knowledge web.

It is based on the action of the wind to build a web, first from the height of one tree, using the wind to drift to another tree, and then from the height of another tree down and then through the wind back back, because of the spider web.

It is very thin, few people observe the warp and weft, and generally spiders connect the warp and then the weft. The spider builds a web in a small local area, first spins silk to fix one end, and then uses the silk to swing to the other end to fix; If it is a large area or a long distance, the spider first spins silk on one tree, and then climbs along the floor under the silk to another tree to fix, generally fixing 3 silks, and then webs at the intersection of the silks.

When I was a child, I personally experienced the process of spider webbuilding, why spiders can pull out the main line in the air, even if there is an unfathomable place between two objects, spider silk can be made.

It turns out that the spider has the instinct to jump, sticking silk on the origin, and then jumping outward, the body will float out with the wind, and when it floats in the wind, it will continue to pull out the silk, and once it reaches a certain length, it will be blown to the opposite object, and then it will become the first line after bonding. What if the opposite side is not in a vertical position and the spider really can't get by? That is to pull out the silk and let the wind drift through it, because the silk that was pulled out at that time was sticky.

When I was a child, I often saw a spider hanging from the middle of the door, and the children quickly told their parents that the family said that the spider hanging on the door was a visitor, because the children were most looking forward to the visitor having good food. In fact, the phenomenon I observed at the time was that the spider hung from the top to the ground, pulled out a filament, and then climbed up along the door frame into several points, through hanging, jumping, fluttering out of the warp and then from the surrounding in turn to the center of the regular sticky web, when I was a child, I particularly admired the little spider is very smart, and I remember such a riddle: Nanyang Harmonic Ge Liang.

Sit firmly in the military tent and set up a gossip array.

Catch the flying generals. The first one is to let it float to the opposite side with the air current. Because it is sticky, it will wrap around the opposite side. Usually the length of this wire must be greater than or equal to the distance to the opposite side.

Spiders can climb to heights with the slime on their legs, or they can climb to heights by weaving webs.

Spiders fly up the wind with "paragliders" made of their own silk, and they do the same when weaving webs.

Spiders are very unique insects, although spiders do not have wings and cannot fly, but they use silk to pull their webs to get where they want.

Spiders don't have wings.

Spiders are terrestrial ecosystems.

The most abundant predatory natural enemies play an important role in maintaining the stability of agricultural and forestry ecosystems.

There are 42,751 species (subspecies) of spiders in 3,859 genera and 110 families in the world, and there are more than 3,800 species in 67 families in China.

Spiders feed on insects, other spiders, myriapods, and some spiders also feed on small animals. Jumping spiders.

Good eyesight, can dive within 30 cm to catch prey, pounce on it. Crab spiders.

Wait for prey on flowers of similar body color. Spiders burrowing in the earth build burrows lined with silk, and the entrance of the burrow has a trap that opens at night to prey on insects that pass through the hole. funnel spiders weave funnel webs, and insects fall into the nets to cause vibration; The spider itself resides in a filament tube with a narrow end that leads into a plant or a crevice in a rock.

Few people realize that spiders can actually fly. It's not hard to understand how the cobwebs between the tops of the two large pillars hang in many cases if they can't fly. If you climb step by step, it is too inefficient for the little spider.

In fact, many species of spiders, especially young spiders, can fly, but unlike birds, they use their own silk to "fly". They will climb to the height of the object, face the direction of the wind, spin the silk, and as soon as there is a faint updraft, they can take off into the air.

Spiders don't just use their webs to build their webs. When the larvae hatch in large numbers, this skill can help them spread quickly. According to research, these flying spiders may even land on islands or ships hundreds of nautical miles from the mainland.

August 4, 1927, was an unfortunate day for Roosevelt. Due to his illness, he will face the cruel reality of lifelong disability, and his legs will forever lose the ability to walk. This incident was a painful blow to Roosevelt:

Roosevelt had ambitious plans and visions for his future and future, but illness shattered them all. Roosevelt contemplated suicide, and his wife encouraged him to fight his illness. She led Roosevelt to his home in the country, where he had not been there for a year because he was busy with work.

In one corner of the room, there was a large spider web, and she seemed to remember something. His wife said to Roosevelt, "Look, such a big cobweb!

Roosevelt remained silent, not daring to show any interest in cobwebs. "How can a spider weave such a large web in the air without wings? His wife asked.

Roosevelt shook his head. "My grandmother told me that when a spider weaves a web in the air, the silk must not touch anything, otherwise the silk will break. But the spider didn't give up, and broke off and started again.

Spiders weave their webs with patience and perseverance. His wife's good intentions made Roosevelt shed tears of repentance. In 1932, at the age of 50, Roosevelt ran for the first time.

In the history of the United States, there has never been a disabled person running for the first place, but Roosevelt was full of confidence in himself. Finally, he was named the best in the United States and was loved by the people. In the long river of life, it is inevitable to encounter setbacks and failures, but we should not be discouraged, do not retreat, and face them with a good attitude.

It's not scary to fail, it's scary to be afraid of failure. The spider has wings, but its wings do not grow on the body, but in its mind - that is, bravery, strength and indomitability. The article is quoted from: Adopt.

The landlord has a similar reference to himself.

Spiders have 8 legs, dragonflies have 6 legs and 2 pairs of wings, cicadas have 6 legs and 1 pair of wings, now there are 18 of these three kinds of insects, with 118 legs and 18 pairs of wings, spiders, dragonflies, cicadas how many are there?

Analysis This is a complex problem of "chickens and rabbits in the same cage", first of all, dragonflies and cicadas are 6 legs, and they can be considered together when counting legs, so spiders have (118-6 18) (8-6) = 5, so dragonflies and cicadas have a total of 18-5 = 13, so dragonflies have (18-1 13) (2-1) = 5, and cicadas have 13-5=8.