Extinct Species are species that are no longer living.  Species that become
extinct go through the process of  being a species of concern, then a threatened species,
and then they become endangered. When a species is extinct it means  that they have all died because their
source of food has become extinct or moved to a different place. Humans can also cause a species to become extinct. They could over hunt them and then eat them, or use their feathers or fur for coats and accessories. Pollution is also a big reason why species become extinct. For example, cars use a lot of gas and when you are driving the  fumes from the gas can get into water or different environments where many different species live and it could pollute their habitat.

 
One  species of animal that became extinct is the passenger pigeon. People would  hunt them and
then use their feathers for hats and accessories. The labrador duck is also an extinct animal. They were hunted for food until they became extinct.


The Endangered Species Act is a way to protect animals so that no more become extinct.