Insects are among the most successful animals on earth.
Insects exist in almost all climes from the hottest desert to the coldest tundra, both on high mountains and in deep waters. Not only are insects more numerous in species, but they are also numerous over the surface of the earth. Insects are distinguished from all other animals in 5 major ways. These characteristics have enabled them to adapt to and fill many niches throughout the world. Even though insects are very diverse in some ways, they are remarkably similar in others.