Animals are wonderful. If you look closely at how they live, you will find many surprises. It is hard to look closely at insects, because they are very small. Plus, many of them fly away when you come near. But if you have a chance to watch them, you will discover how they live. Watching animals is a job that scientists do, called making observations. They have learned a lot about animals.
Scientists learn about tiny animals, and they have studied insects. They found that insects have tools, and they use those tools to survive. For example, they learned about the sawfly. This is just one animal they have studied. They call it the sawfly because it possesses a kind of saw. It's not a real saw, but it resembles one, and it works like one. It is actually a part of the sawfly’s anatomy. The sawfly uses the saw to make places where the eggs will be safe. It saws at plants in order to create a space where eggs can go. Afterward, the sawfly does something very special. It makes a sort of homemade glue that fastens the eggs where they are laid. We are not exactly sure how it does that, but if you can watch the sawfly you will see this happen.