Cenozoic Groupshot

Was in the mood for drawing prehistoric beasts, so here's a whole menagerie of Cenozoic critters in scale with each other and a human (or at least they should be in scale).

The beasts in the drawing are as follows:

Propalaeotherium hassiacum

Thylacoleo carnifex 

Australopithecus afarensis 

Hyaenodon gigas 

Smilodon populator

Gastornis gigantea 

Elasmotherium sibiricum 

Cygnus falconeri 

Gigantopithecus blacki 

Kelenken guillermoi 

Mammuthus primigenius

Varanus priscus

Pelagornis sandersi

Megatherium americanum

Deinotherium giganteum

Paraceratherium transouralicum