Seventeen thousand (17,000) is the number of lenses that a butterfly has. The lepidopterans in question rely upon compound eyes for vision. Each eye uses 17,000 ommatidia, or light receptors each of which has a cone and cornea that together work as a lens.
Dragonflies have as many as 30000 lenses in each eye
They have two main eyes, but each of these eyes are made up of approximately 20,000 to 25,000 tinier eyes, allowing them to zero in on the flying insects that are their daily meals.
Dragonfly has many lenses in it's eye. Probably nature thought that many lenses are required to see many objects. So it is probably natures experiment in evolution of eye. You have single lens in each eye of more evolved animals.
they are 5,500 dragonflies across the world
Like all insects, dragonflies have six legs, arranged in three pairs.
It means that there is some sort of gathering of insects that the dragonflies are eating
Sound it out: dra-gon-flies From this, we can deduce that dragonflies has three (3) syllables.
Dragonflies lay hundreds of eggs at one time. However, many do not survive as they are eaten by other insects and some birds.
Dragonflies have too many predators to list. They're eaten by birds, bats, frogs, fish, large spiders, wasps and other dragonflies, to name a few.
There are many superstitions regarding dragonflies in folk culture. Many people believe that the presence of a dragonfly means good luck.
There are hundreds of species of Dragonflies
One can buy these lenses on many websites and stores. Walmart and Target have a huge selection of these types of lenses to choose from. Many people buy these lenses each day.