Smilodon

That's a Smilodon. 

A Sabre Toothed Tiger with long Fangs. 

All Sabre Toothed Tigers were prehistoric, not modern. 

The Smilodon was one of the most 

ferocious prehistoric Mammals of all Time. 

That must be a Sabre Toothed Tiger in the Hole 

that Huey, Dewey and Louie got but not a Dinosaur 

from Ducktales Episode called "Dinosaur Ducks" 

was a Smilodon. 

The Smilodon was an extinct prehistoric Animal 

from the Cenozoic Era the Age of Mammals, 

not the Mesozoic Era the Age of Dinosaurs.