Does every insect have wings?

More than 320 million years ago, insects became the first creatures to take to the air. Flight helped them to escape danger and to find new habitats and has always played an important part in their survival. Most insects have two sets of wings, although some orders also have a few flightless species.  Ladybugs, along with many beetles, have two hard forewings that shield and protect the hind wings when not in flight.