The world is full of animals of all shapes and sizes. It’s the
larger mammals, birds, reptiles, amphibians, and fish that we
mostly notice, but these animals are vastly outnumbered by
much smaller creatures including insects and spiders. We call
them bugs. Many are tiny, yet they are the most successful
creatures on Earth. Insects were also the first animals to fly,
enabling them to escape from predators and conquer new
areas in the search for food and a mate.