Cover News Reporter Yu Ting
"Jade eyes mica wings, lighter than pink butterfly thinner than bee", this poem is the best description of dragonflies.
The dragonfly we call in our daily lives belongs to the Arthropod genus Insects Dragonfly Order, which is widely distributed and has a wide variety of species. There are more than 5,000 species around the world. As a carnivorous and beneficial insect, dragonflies often live on the waterside and prey on a variety of agricultural and forestry pests such as flies, mosquito , flies and small butterfly moths. At the same time, dragonflies can also be used to monitor water quality, and their special body structure and flight capabilities are also used in mechanics and bionics research.
In 2022, the Chengdu Park City Construction Management Bureau organized the "Insect Community Diversity " investigation and monitoring work in the parks in Chengdu. In Bailuwan Park, the cover news reporter and investigators felt the beauty of dragonflies together.
Bailu Bay Wetland Park Wetland resources are abundant. Egret reflections swept across the water, and Metasequoia is actually lined up on the water. Dragonflies sometimes pass through the cedar forest and sometimes stand on the lotus to attract people to stop. They are a rare and good place to watch dragonflies. "The standardized titles are not called "Share Dragonflies", they should be "Share Dragonflies," said Gu Haijun, who is responsible for the investigation of Southwest Minzu University, introduced that the broad sense of dragonflies is divided into three categories: dragonflies, flies and damselfly (Share). This investigation on dragonflies was launched in Bailu Bay Park.
dragonfly five types
blue forehead and refreshing marijuana dragonfly. The top of the head is blue-black, the body is black, the side plates of the abdomen have yellow spots, transparent wings, and the male insects are covered with blue and white frost, while the females do not, so that they can distinguish between male and female. The Blue Eshumai Dragon prefers to live by ponds with dense aquatic plants and lay eggs in the water by scattering water.
bright red dragon. "The red dragonflies cross the water, and the flying dragonflies beside people." The red dragon is vermilion red and its wings are transparent. The red dragon mainly appears in April-December and often moves near grass near the water. Flying at low altitudes on the water makes it difficult to catch its traces. It is one of the common dragonflies. Because of its dazzling red people usually regard the red dragon as a symbol of festive and auspiciousness.
Black-winged dragonfly resembles a butterfly. The black-winged dragonfly flies gracefully, and its wings are shining brightly under the sunlight, like a butterfly. Most of the wings of the Black-Winged Dragon are metallic black, with blue-green glitter, and the forewings are partially transparent. Its nymph has extremely high requirements for water quality, proving that this Egret Bay water area is very clean.
Jade belt dragonfly with white jade wrapped around. The so-called jade belt refers to a belt decorated with jade. The jade belt dragon is named because the second to fourth sections of mature male insects are white and the female insects are yellow. Standing tall on the river, it looks like a gentle young man, but it is not a gentle and elegant character. It has superb flying skills and can even fly backwards, is agile in movement, likes to patrol your territory, and its whereabouts are erratic.
golden yellow dragon . The yellow dragon has transparent wings, slightly red veins, the male face is olive, the eyes are brown on the top and blue-gray on the bottom. The markings on the body vary according to the type. It moves by swamps, overgrown ponds and slow streams, and there are many reed lands beside the wetlands of Egret Bay.
fly and four types of
yellow and black small fan spring flies. The small round fan spring flies are , genus genus 1. Its stem nodes are brown, with narrow sides and yellow stripes; most of the outer sides of the upper palate are yellow, and its inner edge and end are black; and its most distinctive feature is that there is a pair of small fan leaves at the end of the abdomen, which is smaller than the fan leaves of the large round of fan springfly. It is often active in ponds and streams, and is an important natural enemy insect that is beneficial to humans and an indicator of the water quality environment.
Dragonfly’s object worm (cong), also known as damselfly. They are usually smaller in size but have wide wings and can be folded toward the tail. When resting, they usually have four wings standing upright on the back of the body. The little worm is the smaller type of damselfly, and it is also the smallest dragonfly in Chengdu. Common small cervixes in Chengdu include yellow-tailed small cervixes and cup-spotted small cervixes, which are mainly distinguished by the shape of anal attachment. It is generally difficult to tell which type of small cervix is from the photos.Adults are generally 16-19mm long, adult compound eyes are black on the top and green on the bottom, and the side of the body is pale yellowish blue. It can often be found in wetlands, paddy fields and overgrown ponds. The little cervix in the picture is mating, and the male clamps the female's neck with his tail.
smart and cute blue tail horn. The blue-tailed damselfly is a very small type of damselfly. The male insect has green compound eyes and small blue spots behind the eyes. The back of the chest and the first 7 sections of the abdomen are bright black, and the sides and tail of the chest are blue. They often stay on the grass by the pond to rest, because they are small and difficult to notice.
has a unique foot skeleton. The forehead of the leaf foot fan is black-brown, with transparent wings and brown wing moles. The tibia of the middle and back foot expands into a unique white fan-shaped body, and often stops near the water surface.
In addition, Gu Haijun also found the "fake and real" butterfly horn in the investigation that night. Butterfly horned horns are often mistaken for dragonflies because of their similar appearance, but their tentacles are hammer-shaped and have a length of more than half of the forewings. They belong to the family Acetaceae. Because its tentacles are like butterflies, they are named Butterfly Horn. The transparent black wings of the butterfly horn flies give it strong flight ability and is an important predatory insect.
Through this investigation, Gu Haijun found that there are many species of insects in the Orodosaurus in the Egret Bay and some of them have strict requirements on waters, which proves that the ecological environment of the waters in the park is good.
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