Spiders and insects have a lot in common. Both are small animals with many legs, and most people do not like them. But while these creepy crawlers are similar in many ways, they are actually different kinds of animals. Readers will discover what sets insects and spiders apart and learn how different species are suited for their many habitats around the world.Spiders and insects have a lot in common. Both are small animals with many legs, and most people do not like them. But while these creepy crawlers are similar in many ways, they are actually different kinds of animals. Readers will discover what sets insects and spiders apart and learn how different species are suited for their many habitats around the world.