Something interesting
about dragonflies:-
Dragonflies were some of the first winged insects to evolve, 300 million years ago.Nowadays dragonflies have wingspans of only two to five inches, but fossil dragonflies have been found with wingspans of up to two feet.There are more than 5,000 known species of dragonflies all over the world.
In the larval stage, which can take approximately up to two years, dragonflies are connecting with water and eat anything like mosquitoes.At the end of its larval stage, the dragonfly moves out of the water, then its hard outer cover that protects his body called exoskeleton breaks open and releases the insect’s abdomen, which had been packed in like a telescope.Dragonflies have four wings to fly and they can fly straight up and down, like a helicopter.
Dragonflies catch their insect prey by holding it with their feet.The engineers have greatly inspited by the flight of dragonfly and engineers have dream to make robots that fly like dragonflies.They live up to a year.A single dragonfly can eat 30 to hundreds of mosquitoes per day.Scientists have tracked migratory dragonflies and they found that green darners from New Jersey traveled only every third day and an average of 7.5 miles per day.A dragonfly called the globe skinner has the longest migration of any insect 11,000 miles back and forth across the Indian Ocean.
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