The principle of parrot's vocalization
Analysis on the principle of parrot's vocalization; Why do parrots talk? In fact, the secret lies in its special physiological structure. Vocal tube and tongue. Although everyone can speak, the vocal organs of parrots are different from those of humans. The vocal organ of the parrot is called the vocal tube, which is located at the junction of trachea and bronchus, and consists of 3- 6 dilated and deformed trachea and three pairs of deformed bronchus adjacent to it. Ordinary birds can make sounds with different frequencies and heights because when the air enters the pipe, it makes different sounds with the vibration of the pipe wall. In addition to the basic characteristics of birds, the vocal organs of parrots are more perfect than ordinary birds. There are four or five pairs of special muscles in their sound tubes, which are used to adjust the diameter, sound production rate and tension of the sound tubes. The vocal cord muscles contract or relax under the control of the nervous system, and chirp.
In the whole structure of the sound tube, the sound tube is also very similar to the structure of human vocal cords, except that the human vocal cords are 20 cm from the throat to the tongue end, which is a right angle, while the parrot's sound tube is an obtuse angle from the tongue section 15 cm. This angle is the key to determine the pronunciation syllable and tone. The closer to the right angle, the stronger the sense of syllable and tone. Therefore, parrots can make cadence sounds and syllables like humans.
Except for the tongue, the parrot's tongue is very developed, smooth, thick and soft, and its shape is very similar to that of human tongue. It is because of this standard vocal condition that parrots can pronounce some simple but accurate syllables.
The shape characteristics of parrots Parrots are typical climbing birds. Their feet are toe-to-toe, with two toes forward and two toes backward, which are suitable for grasping. Parrots have strong beaks and can eat hard-shelled fruits. Parrots are mainly fruit-eating birds in tropical and subtropical forests with bright feathers. The largest parrot is a purple-blue macaw with a body length of 100 cm, and the smallest parrot is a blue-crowned macaw with a body length of only 12 cm. These parrots carry the nest material in a very special way. Instead of using a curved beak, they put the nest material into short tail feathers, which is also the way other lovers of the same kind carry the nest material. There are 6 species of Jurassic parrots, all within 10 cm. Six species are only found in New Guinea and nearby islands.
Parrots have many kinds, different shapes and bright feathers. There are luxurious and elegant purple-blue macaws, sunflower cockatoos with white heads in Huang Guan, eloquent Amazon parrots, colorful rainbow honey-sucking parrots, small sunflower-shaped cockatoos, small and exquisite budgerigars and peony parrots, red-green parrots and pigeon-shaped african grey parrot. Thailand 200 1 issued a set of parrot stamps, namely cockatoo, Alexander parrot, short-tailed parrot and flower-headed parrot; Among them, both red-breasted parrots and parrots have wild populations in China. There are two kinds of cockatoos: Taihō cockatoos and small cockatoos, especially Taihō cockatoos, which are well-known caged birds at home and abroad. They are mainly produced in Sichuan Province of China and northern Yunnan Province in eastern Tibet, and are also known as the big purple cockatoo and Sichuan cockatoo.
Living habits of parrots Most parrots feed on fruits, seeds, nuts, berries, buds and twigs of plants on trees or on the ground, and also eat a small amount of insects. Honey-sucking parrots feed on pollen, nectar and soft and juicy fruits.
In the process of foraging, parrots often cooperate with powerful hooked beaks and flexible toe feet. Toe foot, two toes forward and two toes backward, suitable for grasping. When climbing in the canopy to find food, first bite the branches with your mouth, and then use them on your heels; When walking on a solid tree trunk, insert the tip of your mouth into the tree to balance your body and speed up your movements; Do you often use one foot when eating? Hands? Stuff your mouth with food.
It is observed that more than 10 species of parrots use their left and right feet when foraging, and it is found that more than 72% of individuals mostly use their left foot to catch food. The comparative anatomy of hind limb muscles shows that the left foot is obviously longer than the right foot, and the right foot is only slightly longer than the left foot.