The bigger a bird s wings, the longer the delayed flight must be, right?

The larger the wings of a bird, the longer it may fly, the length of time the bird flies depends on the type of bird, not the larger the wings of the bird, the longer the flight time.

Birds, also known as birds. Definition: An oviparous vertebrate whose body surface is covered with feathers.

The main characteristics of birds are: the body is streamlined (spindle or fusiform), and most of them fly life. The body surface is covered with feathers, and the forelimbs generally become wings (some species have vestigial wings); well-developed pectoral muscles; The rectum is short, the amount of food is large, and the digestion is fast, that is, the digestive system.

It is well developed, helps to lose weight, and is conducive to flying.

The heart has two atria and two ventricles, and the number of beats is rapid. Constant body temperature. In addition to the lungs, the respiratory organs also have multiple air sacs to assist breathing, so that birds can breathe oxygen through the lungs during both inhalation and exhalation, that is, double breathing.

The Origin of Birds: The study of the origin of birds has gone through a number of stages that are mainly like this.

Huxley, 1868.

The hypothesis that birds originated from dinosaurs was proposed. Huxley was a famous British biologist and Darwinian of evolution.

He was also one of the first scholars to propose the theory that birds originated from dinosaurs.

Birds are 65 million years ago in the Cretaceous period.

Survivors of a mass extinction event that wiped out the dinosaurs on Earth, and only some of the bird's ancestors survived. And new research based on genomic data suggests that dinosaurs went extinct.

Between the next 10 million and 15 million years, birds experienced a "super-species explosion" that gradually evolved into more than 10,000 species of birds known as the new class of birds, from which 95% of the extant birds derive.

The larger the plate making of the bird, the longer the flight is delayed. Definitely longer, right? That's right. Definitely right.

Among birds, the fastest flight speed is: kilometers per second.

The fastest bird is the sharp-tailed swift with a spine on its tail.

There are two reports about its speed, the former Soviet Union in 1942.

Reported speeds are kilometers per hour; And in 1934, during a kilometer flight in the Kacha Mountains region of northeastern India, the sharp-tailed swift was measured to reach a speed of up to kilometers per hour with a stopwatch.

Swifts are very different from the usual swallows that come from autumn to spring, the former is a small climbing bird, and one of its biggest characteristics is that all four toes are facing forward;The latter is a songbird with three toes in front and one behind, and the two belong to two different orders. There are many species of swifts, and there are 7 species in China, the most common of which is the Beijing swift.

It often gathers large groups to fly in the air to catch insects, and nests in the attic of some ancient buildings with large Chinese roofs, so there are building swallows again.

called. Swifts are very similar to swifts, about 9 23 cm (in) long. The wings are long and the body is strong and powerful. Plumage.

Dense, dull or shiny gray, brown or black, sometimes with pale or white markings on the throat, neck, abdomen or waist. The head is broad, and the mouth is short, broad, and slightly curved. The tail is usually short, but some are long and forked deeply.

The foot is weak and usually clings to a steep face only with its sharp claws. Swifts that land on flat ground may no longer be able to fly. The hind toe of the soft-tailed swift turns to the front to help catch the steep straight face;The short, pinpoint-like tail feathers of the spiny-tailed swift provide support, while the feet do not change much.

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Among the birds, the fastest flying swift is the white-throated pintail swift.

When the white-throated pintail swift flies, it can reach a speed of up to 200-300 kilometers per hour, which is similar to that of a high-speed railway.

The most capable bird in the world can fly for hours even without flapping its wings!