How many animals are alredy extinct?

It is estimated that over 99% of all species that ever existed on Earth are now extinct. The exact number of extinct species is difficult to determine, as many species have likely existed and become extinct without ever being recorded. However, according to the International Union for Conservation of Nature (IUCN), there are currently 968 extinct species listed on their Red List of Threatened Species. This number includes species that have disappeared completely from the planet, as well as those that are considered to be "Possibly Extinct" or "Extinct in the Wild".