Facts about dragonflies....- Dragonflies were some of the first winged insects to evolve, some 300 million years ago. Modern 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 of which (along with damselflies) belong to the order Odonata, which means Òtoothed oneÓ in Greek ....- A single dragonfly can eat 30 to hundreds of mosquitoes per day..- Some adult dragonflies live for only a few weeks while others live up to a year..- Nearly all of the dragonflyÕs head is eye, so they have incredible vision that encompasses almost every angle except right behind them....Source: smithsonianmag.com