Static, winged horse with outstretched wings. Model: Pegasus by YahooJAPAN, licensed under CC BY 3.0 .

Standing horse Model: Horse by YahooJAPAN, licensed under CC BY 3.0 .

Zebra with short, upright mane

Large terror bird with a slender body and massive beak

Large terror bird with a slender body and massive beak

Large terror bird with a slender body and massive beak

Large terror bird with a slender body and massive beak

Large terror bird with a slender body and massive beak

Large terror bird with a slender body and massive beak

Chicks of a large terror bird with a slender body and a massive beak

Chicks of a large terror bird with a slender body and a massive beak

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Early, prehistoric mammal relative with a stocky, powerful body, horny beak and tusks

Prehistoric proboscidean with a shovel-like lower jaw and downward-curving tusks

Prehistoric proboscidean with a shovel-like lower jaw and downward-curving tusks

Prehistoric proboscidean with a shovel-like lower jaw and downward-curving tusks

Prehistoric proboscidean with a shovel-like lower jaw and downward-curving tusks

Prehistoric proboscidean with a shovel-like lower jaw and downward-curving tusks

Crocodile-like, prehistoric amphibian with a pointed mouth and long body

Crocodile-like, prehistoric amphibian with a pointed mouth and long body