Animal Types and Characteristics Mammals:body covered by hair or furwarm-bloodedhave a backboneproduce milk Reptiles:body covered by scalescold-bloodedhave a backbonemost lay hard shelled eggs on land Birds:body covered by featherswarm-bloodedhave a backbonelay eggs Insects:most are small air-breathing animals6 legs2 antennae3 body sections (head, thorax, abdomen)Spiders:also termed arachnids8 legs8 eyesthey spin webs Aquatic Animals:most have gillsfound in lakes, rivers, and oceans
