There have been a large number, unfortunately:
Tasmanian Tiger
Quagga
Golden Toad
Caribbean Monk Seal
Pyrenean Ibex
Bubal Hartebeest
Javan Tiger
Tecopa Pupfish
Baiji River Dolphin
dinosaur
They are well beyond endangered, the Saber-tooths became extinct around 11,000 years ago.
Ther are mammoths they have benn extinct for years
yes Yes, the saber tooth tiger is extinct, the last of their kind became extinct thousands of years ago.
The Eohippus became extinct in the mezozoic era (middle age era). It became extinct because of the climate changes and the struggle to survive. Then it changed into a Miohippus after milions of years. - a fifth grader wrote this answer
the megatherium went extinct about 8,000 years ago
A brontosaurus eats living plant's, they did not eat meat.Strictly speaking, bronotsauruses no longer eat, since they became extinct millions of years ago.
They became extinct 75 million years ago :-P
the same time as dinos became extinct. 65 million years ago
Trilobites became extinct about 250 million years ago, in the Mesozoic Era.
Non avian dinosaurs became extinct 65.5 million years ago, at the end of the Cretaceous. However, birds are considered dinosaurs. Because birds still exist, dinosaurs are not completely extinct.
Dinosaurs are now extinct. There are many species of birds that are extinct.