Woolly Mammoths were about 11 feet tall, lived in the Arctic Regions of the Pleistocene and became extinct 5000 or 10,000 years ago.

Pterodactyl

Pterodactyls lived on every continent during the Jurassic (205 million to 138 million years ago) and were extinct by the end of the Cretaceous (65 million years ago)

Horned Toxodont, Trigodon Gaudryi, of the Pliocene near present day Monte Hermoso, Argentina
 

 
The Extinct Giant Moa

15 ft tall, 550 lb Wingless Bird of New Zealand, believed to have lived as recently as the middle ages.

The Tasmanian Wolf is a carnivorous marsupial and a relative of wombats and kangaroos. It even has a pouch. Believed to be extinct, sightings claims persist.

The Giant Turtle Archelon was a 15 feet long slow moving creature of the ancient seas of the Cretaceous

Dodo

Portuguese explorers discovered the 50 lb flightless Dodos in 1505. The last Dodo was killed in 1681.
 

Hesperornis regalis

From the Oceans of Kansas, an Extinct Five Foot Long Diving Bird of the Cretaceous.

The Great Auk inhabited the coasts and islands of the North Atlantic to Iceland almost to the Arctic Circle.  Extinct by mid Nineteenth Century.

Ferocious marine reptile predators from the the Cretaceous Period

 
Mesosaurus

Extinct Reptile from the Permian Period. Look at those teeth! Mesosaurus inhabited fresh waters of Africa and South America  supporting the theory of continental drift.

Phororhacos longissimus

Extinct, 9 ft Tall, 280 lb Flightless Bird Lived In Patagonia

Pteranodon

One of the largest pterosaurs (Triassic Period) and descendant of the Pterodactyl had a wingspan as long as 23 ft. Pterosaurs were the first vertebrates to fly

Branchiosaurus amblystomus an extinct amphibian from the Permian Epoch
 

Pterodactylus antiquus was a carnivorous flying reptile, now extinct, lived in Africa and Europe during the Jurassic Period. Image is from a fossil