An "invertebrate"  is any animal lacking a  "back bone" or vertebral column. The group includes 95% of all animal species! Ladybugs belong to the group  "Arthropod."  Arthropods are the largest group of animals, and includes all insects, arachnids, and crustaceans. Ladybugs are insects. Covered by a hard exoskeleton made of chitin. It is impossible to say what the average … Read more