COOL UNBELIEVABLE FACTS ABOUT DRAGONFLIES|| THE APPU WORLD
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Do you know what're we gonna learn today?
Yeah dragonfly
We are gonna learn unbelievable facts about dragonflies
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Dragonflies are expert fliers. They can fly straight up and down, hover like a helicopter and even mate mid-air. If they can’t fly, they’ll starve because they only eat prey they catch while flying.
The flight of the dragonfly is so special that it has inspired engineers who dream of making robots that fly like dragonflies.
Before they go active during the day, they need to bask in the sun to warm up since their thorax needs to reach 25°C to be ready for fllight. If the sun is not present, some dragonflies can generate heat by shaking their flight muscles before taking off.
Aside from the fact that they can see ultraviolet light, dragonflies can see colors beyond what humans can see. They are also well-versed in motion detection and they can see all directions at once at the same time.
Most odonatologists live in temperate areas and the dragonflies of North America and Europe have been the subject of much research. However, the majority of species live in tropical areas and have been little studied. With the destruction of rainforest habitats, many of these species are in danger of becoming extinct before they have even been named. The greatest cause of decline is forest clearance with the consequent drying up of streams and pools which become clogged with silt. The damming of rivers for hydroelectric schemes and the drainage of low-lying land has reduced suitable habitat, as has pollution and the introduction of alien species.
Dragonflies are represented in human culture on artefacts such as pottery, rock paintings, statues and Art Nouveau jewellery. They are used in traditional medicine in Japan and China, and caught for food in Indonesia. They are symbols of courage, strength, and happiness in Japan, but seen as sinister in European folklore. Their bright colours and agile flight are admired in the poetry of Lord Tennyson and the prose of H. E. Bates
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