About dragonflies

Dragonflies are an order of winged subclass. Most members of this order are large and medium-sized insects, with large heads and flexible rotation. Two pairs of wing membranes are transparent, and the wings have many transverse veins. There are often wing moles near the top of the wing. The abdomen is slender, and the male copulator is born on the ventral surface of the 2nd and 3rd abdominal segments. It is distributed all over the world, especially in tropical areas. About 5 species are known, and about 35 species and subspecies are recorded in China. Dragonflies are 2 ~ 15 mm long. How gorgeous the colors are. Antennas are short and bristle-like, and the body has 3 ~ 7 nodes. Compound eyes are developed, accounting for most of the head, with 3 monocular eyes. The chest is as thin as the neck. The combination of the middle chest and the back chest is called chest closure. The left and right upper front side pieces are on the dorsal midline in front of the chest and back. Feet close to the head, slender. When flying, the middle foot and hind foot can extend to the front of the head, which is convenient for catching flying insects in the air. When resting, the feet often cling to the branches and leaves of plants. When the male is sexually mature, he hides the semen in the copulator. During mating, the male insect "catches" the top of the female insect's head or the back plate of the front chest with the anal appendage at the end of the abdomen, and the male and female fly together, sometimes until the female dragonfly lays eggs. Sometimes, the female worm bends the abdomen downward and forwards, and the reproductive hole at the back of the abdomen is closely attached to the copulator of the male worm for fertilization. Many dragonflies have no ovipositors. They hover above the pond, or fly back and forth along the stream, scattering their eggs in the water during the flight; Some species fly close to the surface of the water and use their tails to "water" to lay eggs in the water. Both Odonata and Homoptera have ovipositors. They use ovipositors to cut the stems and leaves of aquatic plants and lay eggs into the tissues of plants. Some damselflies can dive into the water along the aquatic plants to lay eggs. Dragonflies are semi-perverts. The vast majority of larvae are aquatic, and the larval age is generally 1 ~ 15 years, which varies from species to species. Many dragonflies have a generation every year, and some species take 3 to 5 years to complete a generation. On rice plants in the south of China, dragonflies can sometimes be persuaded to shell (see an animation). This kind of dragonflies is at least 2 generations a year. When the larvae are mature, they climb out of the water, fix on stones or plants, and then emerge as adults. A few species of dragonfly larvae are terrestrial. The newly hatched larvae are covered with a film, which is the first instar larvae. It lasts for a short time, and some species lose the film after a few seconds or minutes and become the second instar larvae. Larvae grow up on small animals that eat water. Some of them live at the bottom of the water, and some are attached to the aquatic plants in the upper layer of the water, which can feed on the mosquitoes. Adults catch insects of suitable size for food in flight. Odonata insects mostly fly in the open air. Odonata insects often come out at dusk to prey on mosquitoes, small moths, leafhoppers, etc., and can prey on food equivalent to their own weight within 3 minutes, so they are important beneficial insects. It is divided into 3 suborders. ① Homoptera, the insects of this suborder are often brightly colored, commonly known as damselflies. The shape and vein sequence of the front and rear wings are similar. The wing base is narrow to form a wing stalk. When resting, the four wings are generally vertical and three-dimensional back. This sub-item is divided into 2 general families and 8 families; (2) There are only two species of Mesoptera, one from the south side of Himalayas and the other from Japan, which are the surviving descendants of ancient groups and are called living fossils; ③ Heteroptera, the insect of this suborder is commonly known as dragonfly. Including 2 superfamilies and 5 families, Odonata and Odonata are common. Widely distributed throughout China.

dragonfly

an order of winged subclass. Most members of this order are large and medium-sized insects, with large heads and flexible rotation. Two pairs of wing membranes are transparent, and the wings have many transverse veins. There are often wing moles near the top of the wing. The abdomen is slender, and the male copulator is born on the ventral surface of the second and third abdominal segments. It is distributed all over the world, especially in tropical areas. About 5 species are known, and about 35 species and subspecies are recorded in China.

morphological characteristics: the body length is 2 ~ 15 mm. How gorgeous the colors are. Antennas are short and bristly, with 3-7 nodes. Compound eyes are developed, accounting for most of the head, with 3 monocular eyes. Mouth chewing type. The palate is well developed. The chest is as thin as the neck. The combination of the middle chest and the back chest is called chest closure. The chest-closing structure is special, and the lateral plates are enlarged, especially in the anterior chest. The left and right front side pieces meet at the dorsal midline in front of the chest. Viewed from the side, the longer section of the upper end of the middle thoracic side seam inclines backward. The four wings connected to the pterygoid process move back to the center of gravity which is most suitable for flying, and the shorter section at the lower end of the side seam is perpendicular to the longitudinal axis of the body. Feet close to the head, slender. When flying, the middle foot and hind foot can extend to the front of the head, which is convenient for catching flying insects in the air. When resting, the feet often cling to the branches and leaves of plants. Tarsal section 3. The abdomen is cylindrical or flat, with 1 segments. When the male is sexually mature, he hides the semen in the copulator. During mating, the male insect "catches" the female insect's head or chest backboard with the anal appendage at the end of the abdomen, and the male and female fly together. Sometimes, the female worm bends the abdomen downward and forwards, and the reproductive hole at the back of the abdomen is closely attached to the copulator of the male worm for fertilization.

living habits many dragonflies don't have ovipositors. They hover above the pond, or fly back and forth along the stream, scattering their eggs in the water during the flight; Some species fly close to the surface of the water and use their tails to "water" to lay eggs in the water. Both Odonata and Homoptera have ovipositors. They use ovipositors to cut the stems and leaves of aquatic plants and lay eggs into the tissues of plants. Some damselflies can dive into the water along the aquatic plants to lay eggs.

The majority of semi-metamorphosis larvae are aquatic, and the age of larvae is generally 1-15 years, which varies from species to species. Many dragonflies have a generation every year, and some species take 3 to 5 years to complete a generation. On the rice plants in the south of China, sometimes the larvae of dragonflies can be seen to shed their shells. This kind of dragonflies has at least two generations a year. When the juvenile worm is mature, it crawls out of the water, fixes on stones or plants, and then emerges as an adult. A few species of dragonfly larvae are terrestrial. The newly hatched larvae are covered with a layer of film, which is the first instar larvae, and lasts for a short time. In some species, the film falls off after a few seconds or minutes and becomes the second instar larvae. Young worms grow up on small animals that eat water. Some of them live at the bottom of the water, and some are attached to the aquatic plants in the upper layer of the water, which can feed on the mosquitoes. Adults catch insects of suitable size for food in flight. Odonata insects mostly fly in the open air. Insects of Odonatidae often come out at dusk to prey on mosquitoes, small moths, leafhoppers, etc., and are important beneficial insects < P > Respondents: Monte Cristo Island-probation period 8-13 22:41

1. Biwei Odonata is large in size, green in body, 5.4 cm in male abdomen, 5.2 cm in hind wings, yellow in lower lip, red and yellow in upper lip and front edge.

Its head protrudes from the center, and its top is light in color. There is a black horizontal mosquito in front of it. Its back is yellow, its side edges are black, its chest is yellow-green, its back is mottled, its chest ridge is yellow, its upper edge is brown, and its front wing veins and nevus are yellow-brown.

The abdomen of this dragonfly is swollen at 1.2 nodes, and the first node is green. Section 2 is green at the base and brown at the back, with brown spots or stripes. The third section is brown, with light-colored broad bands on both sides. The fourth to eighth sections are black on the back and brown on the side, and the ninth section is brown with light spots. The female insect is similar to the male insect in shape and color, and the color is lighter.

Biweiting has a fierce personality, strong flying ability and high speed, and often flies back and forth over the high water to prey on flying bugs.

This species of Odonata is mainly distributed in Beijing, Hebei, Jiangsu, Sichuan, Fujian, Yunnan, Xinjiang, Tibet, and some other places.

2. The yellow dragonfly is a kind of medium-sized, widely distributed and numerous dragonfly species, and it is also the most common and familiar dragonfly.

This species of Odonata is reddish yellow in general, with the abdomen of the male being 3.2 cm long and the hind wings being 4 cm long. The female worm's abdomen is 3.1 cm long and its hind wings are 4 cm long. The middle leaf of the lower lip is black, and the lateral leaves are dark brown. The upper lip is reddish yellow, the front edge is black, and the front and rear lip bases and forehead yellow are slightly toothed with short hair.

The top of its head is a big protrusion with black at the bottom and yellow at the top, with a black horizontal stripe in front and black at the back. The chest is dark brown with white spots.

The front of the chest is reddish brown, the side is yellowish brown, and there are black stripes. The first and third stripes are only obvious at the upper and lower ends, and the second stripe is missing. The wing nevus on the wing is reddish yellow, the rear wing arm is pale yellow, the small membrane is white, the foot base is yellowish brown, and the end is brown. The abdomen is reddish yellow with dark brown spots.

the larva of the yellow dragonfly (hydra) is smaller than that of the blue dragonfly, and it is not as fierce in water as that of the blue dragonfly.

this dragonfly is mainly distributed in Hebei, Zhejiang, Jiangxi, Guangxi, Yunnan and other places, and there are some other places.

3. damselfly damselfly is the floorboard of a very common kind of small dragonflies. Its body is long and narrow, and its color is bright like jasper, including many varieties, as many as one or two hundred. It belongs to the "sudden" category among dragonflies.

It is characterized by a small body, a horizontal head, two compound eyes far apart, protruding on the left and right sides, and a narrow base of wings.

Dragonflies are an order of winged subclass. Most members of this order are large and medium-sized insects, with large heads and flexible rotation. Two pairs of wing membranes are transparent, and the wings have many transverse veins. There are often wing moles near the top of the wing. The abdomen is slender, and the male copulator is born on the ventral surface of the 2nd and 3rd abdominal segments. It is distributed all over the world, especially in tropical areas. About 5 species are known, and about 35 species and subspecies are recorded in China. Dragonflies are 2 ~ 15 mm long. How gorgeous the colors are. Antennas are short and bristle-like, and the body has 3 ~ 7 nodes. Compound eyes are developed, accounting for most of the head, with 3 monocular eyes. The chest is as thin as the neck. The combination of the middle chest and the back chest is called chest closure. The left and right front side pieces are on the dorsal midline in front of the chest and back. Feet close to the head, slender. When flying, the middle foot and hind foot can extend to the front of the head, which is convenient for catching flying insects in the air. When resting, the feet often cling to the branches and leaves of plants. When the male is sexually mature, he hides the semen in the copulator. During mating, the male insect "catches" the top of the female insect's head or the back plate of the front chest with the anal appendage at the end of the abdomen, and the male and female fly together, sometimes until the female dragonfly lays eggs. Sometimes, the female worm bends the abdomen downward and forwards, and the reproductive hole at the back of the abdomen is closely attached to the copulator of the male worm for fertilization. Many dragonflies have no ovipositors. They hover above the pond, or fly back and forth along the stream, scattering their eggs in the water during the flight; Some species fly close to the surface of the water and use their tails to "water" to lay eggs in the water. Both Odonata and Homoptera have ovipositors. They use ovipositors to cut the stems and leaves of aquatic plants and lay eggs into the tissues of plants. Some damselflies can dive into the water along the aquatic plants to lay eggs. Dragonflies are semi-perverts. The vast majority of larvae are aquatic, and the larval age is generally 1 ~ 15 years, which varies from species to species. Many dragonflies have a generation every year, and some species take 3 to 5 years to complete a generation. On rice plants in the south of China, dragonflies can sometimes be persuaded to shell (see an animation). This kind of dragonflies is at least 2 generations a year. When the larvae are mature, they climb out of the water, fix on stones or plants, and then emerge as adults. A few species of dragonfly larvae are terrestrial. The newly hatched larvae are covered with a film, which is the first instar larvae. It lasts for a short time, and some species lose the film after a few seconds or minutes and become the second instar larvae. Larvae grow up on small animals that eat water. Some of them live at the bottom of the water, and some are attached to the aquatic plants in the upper layer of the water, which can feed on the mosquitoes. Adults catch insects of suitable size for food in flight. Odonata insects mostly fly in the open air. Odonata insects often come out at dusk to prey on mosquitoes, small moths, leafhoppers, etc., and can prey on food equivalent to their own weight within 3 minutes, so they are important beneficial insects. It is divided into 3 suborders. ① Homoptera, the insects of this suborder are often brightly colored, commonly known as damselflies. The shape and vein sequence of the front and rear wings are similar. The wing base is narrow to form a wing stalk. When resting, the four wings are generally vertical and three-dimensional back. This sub-item is divided into 2 general families and 8 families; (2) There are only two species of Mesoptera, one from the south side of Himalayas and the other from Japan, which are the surviving descendants of ancient groups and are called living fossils; ③ Heteroptera, the insect of this suborder is commonly known as dragonfly. Including 2 superfamilies and 5 families, Odonata and Odonata are common. Widely distributed throughout China.

dragonfly

an order of winged subclass. Most members of this order are large and medium-sized insects, with large heads and flexible rotation. Two pairs of wing membranes are transparent, and the wings have many transverse veins. There are often wing moles near the top of the wing. The abdomen is slender, and the male copulator is born on the ventral surface of the second and third abdominal segments. It is distributed all over the world, especially in tropical areas. About 5 species are known, and about 35 species and subspecies are recorded in China.

morphological characteristics: the body length is 2 ~ 15 mm. How gorgeous the colors are. Antennas are short and bristly, with 3-7 nodes. Compound eyes are developed, accounting for most of the head, with 3 monocular eyes. Mouth chewing type. The palate is well developed. The chest is as thin as the neck. The combination of the middle chest and the back chest is called chest closure. The chest-closing structure is special, and the lateral plates are enlarged, especially in the anterior chest. The left and right front side pieces meet at the dorsal midline in front of the chest. Viewed from the side, the longer section of the upper end of the middle thoracic side seam inclines backward. The four wings connected to the pterygoid process move back to the center of gravity which is most suitable for flying, and the shorter section at the lower end of the side seam is perpendicular to the longitudinal axis of the body. Feet close to the head, slender. When flying, the middle foot and hind foot can extend to the front of the head, which is convenient for catching flying insects in the air. When resting, the feet often cling to the branches and leaves of plants. Tarsal section 3. The abdomen is cylindrical or flat, with 1 segments. When the male is sexually mature, he hides the semen in the copulator. During mating, the male insect "catches" the female insect's head or chest backboard with the anal appendage at the end of the abdomen, and the male and female fly together. Sometimes, the female worm bends the abdomen downward and forwards, and the reproductive hole at the back of the abdomen is closely attached to the copulator of the male worm for fertilization.

living habits many dragonflies don't have ovipositors. They hover above the pond, or fly back and forth along the stream, scattering their eggs in the water during the flight; Some species fly close to the surface of the water and use their tails to "water" to lay eggs in the water. Both Odonata and Homoptera have ovipositors. They use ovipositors to cut the stems and leaves of aquatic plants and lay eggs into the tissues of plants. Some damselflies can dive into the water along the aquatic plants to lay eggs.

The majority of semi-metamorphosis larvae are aquatic, and the age of larvae is generally 1-15 years, which varies from species to species. Many dragonflies have a generation every year, and some species take 3 to 5 years to complete a generation. On the rice plants in the south of China, sometimes the larvae of dragonflies can be seen to shed their shells. This kind of dragonflies has at least two generations a year. When the juvenile worm is mature, it crawls out of the water, fixes on stones or plants, and then emerges as an adult. A few species of dragonfly larvae are terrestrial. The newly hatched larvae are covered with a layer of film, which is the first instar larvae, and lasts for a short time. In some species, the film falls off after a few seconds or minutes and becomes the second instar larvae. Young worms grow up on small animals that eat water. Some of them live at the bottom of the water, and some are attached to the aquatic plants in the upper layer of the water, which can feed on the mosquitoes. Adults catch insects of suitable size for food in flight. Odonata insects mostly fly in the open air. Insects of Odonatidae often come out at dusk to prey on mosquitoes, small moths, leafhoppers, etc., which are important beneficial insects.