GROUPS OF VERTEBRATESOnline version Classification of groups of vertebrates by Concepción de la Flor García 1 Mammals 2 Fish 3 Amphibians 4 Reptiles 5 Birds Fur Viviparous Hair They have live babies They live in many habitats Babies drink milk They breathe with gills They live in water Scales Fins Moist skin They live on land or in water They breathe with gills and lungs Dry skin They live on land Wings Feathers Beak