Animals
There are nearly two million animal species that have been identified up to now. The vast majority of these are invertebrates; that means that they do not have a backbone (spine). Most animals are cold blooded, so they use the natural heat of their environment and the heat from the Sun to maintain their required body temperature.
Carnivores eat other animals, birds and insects. Herbivores eat only plant leaves and grass.
Animals range in size from elephants and Blue Whales down to mice and insects, some of which are very small!
 musk oxen © Copyright Jerry L. Hout US Fish and Wildlife Service license : public domain |
Mammals
Mammals are warm-blooded with certain characteristics. Human beings are classified as mammals. click for more
Reptiles
Reptiles are cold-blooded animals which are members of the class Reptilia. They are cold-blooded, have lungs to breathe air and mostly eproduce by laying eggs.click for more
 bottle nose dolphin Image in public domain  |
Birds
Birds are warm-blooded animals that have feathers, wings, beaks and almost all of them can fly.click for more
Insects
Insects are arthropods. The arthropods family includes insects and spiders.click for more
Fish
Fish are aquatic vertebrates. Fish have gills, fins and other features which allow them to live and breathe in water. click for more
