Most animals on earth are insects. There are about 800,000 species of animals and about 1 million are insects. That is 80 per cent of all animals. Insects have been on Earth for a very long time. Fossils show that insects were here 350 million years ago. Insects have 3 body parts, 2 antennae and 6 jointed legs. Most adult insects have wings. Flied only have 2 wings. All wings and legs are attached to the thorax body part. All insects are covered by an exoskeleton, a skeleton covering the outside of their bodies like Armour. When an insect sheds this covering it is called molting.
Insects also are the most highly developed class of invertebrate animals, with the exception of some mollusks. Insects such as the bees, ants, and termites have elaborate social structures in which the various forms structures in which the various forms of activity necessary for the feeding, shelter and reproduction of colony are divided among individuals especially adapted for the various activities. Also, most insects achieve maturity by metamorphosis rather than by direct growth.
This book contains about 160 insects. The scientific classification, life cycle, habitat and their control are given in this book. This book may not only provide reference but also serve as a guide and inspiration for future research. The scientists, teachers, entomologists, scholars are expected to find this book indispensable. |
