Question: what are the main extinct species?
Answer: Sabre-toothed Cat. Often called Sabre-toothed Tigers or Sabre-toothed Lions, they existed 55 million to 11,700 years ago. Woolly Mammoth. An enormous mammal, believed to be closely related to the modern-day elephant. ...  Dodo. ...  Great Auk. ...  Stellers Sea Cow. ...  Tasmanian Tiger. ...  Passenger Pigeon. ...  Pyrenean Ibex. ...