Most people lump all arthropods, or animals with an exoskeleton, together as "bugs". But there are major differences between types of arthropods. Insects are the most diverse class of animals, but a ...

Bat bugs are wingless, flat, oval-shaped insects. Adults grow up to 1/4 inch long, about the size of an apple seed. They are colored brown, beige or reddish-brown. "The biggest visual difference ...