Endangered means in danger of being extinct that is there are very few organisms of that species and it is in the danger of becoming extinct.  Extinct means that there are no more organisms of that species on the earth. We cannot see them again  And Most importantly let us not weep about the extinct ones but protect the endangered ones.  Examples for endangered species is the tiger and the asiatic lion while the dodo bird is an extinct species....
Endangered species means they do exist on earth but their species are about to extinct.
example: lion tailed monkey.
Extinct species means they once existed but no more. Their species are totally wiped out.
Example: Dinosaur