HOW CAN DRAGONFLIES GLIDE FOR 30 SEC WITHOUT LOSS OF HEIGHT?

According to New Scientist, the micro-thin wings of dragonflies are corrugated and reinforced with pleats, which serve a double purpose: to prevent bending and give a more significant lift while gliding.

The creases have cavities between them that create areas of very low drag and help to generate lifting airflows across the wing. The engineering principles used in the hi-tech wing of a dragonfly can assist in the manufacture of spying robots as well as in the monitoring of pollution levels and disaster management.