Based on fossils of ancient dragonflies, we know these winged insects have been soaring around for at least 300 million years. These colorful insects have sharp mandibles that they use to chew their prey. But don't worry: they only use their jaws to chomp on pesky insects like mosquitoes—not people! They spend most of their time flying through the air in search of food and mates.

Image credits: main image, courtesy of Gerald and Buff Corsi, California Academy of Sciences.