How do we classify animals? There are many different types of animals. We can classify animals according to their main characteristics. There are two large groups. 44 · F O R T Y- F O U R VERTEBRATES INVERTEBRATES BEE WOLF Vertebrate animals have an internal SKELETON. It is made of bones. Invertebrate animals do not have an internal skeleton. SPIDER SNAIL Vertebrates have a head, a trunk, and limbs. Many of them have a tail. wing fin TRUNK foot HEAD LIMBS There are five groups of vertebrates: REPTILES AMPHIBIANS MAMMALS BIRDS FISH skeleton tail INVERTEBRATE SKELETON VERTEBRATE WORD BANK BUTTERFLY
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