Exactly how many extinct animals are there in the world?

== == Given that the definition of an "extinct" animal would be a species of which no living specimens have been sighted in years, then there are no extinct animals in the world. However, if you wish to know how many species have become extinct, I suggest you look at the Wikipedia post linked below. There you will find a list that, excluding the dinosaurs, includes thousands of extinct animals, birds, fish, reptiles, etc. Consider that well over 90% of all the life forms that ever existed on earth are extinct, a complete list would be huge.