Evolution of crocodiles

Three feet long. 5-10lbs. Lived in the swamps of eastern Asia. Ate small animals. Sail on it's back. Split off into pre-historic crocodiles and early dinosaurs. http://www.wired.com/images_blogs/wiredscience/2011/10/xilousuchus-restoration.jpg

http://t3.gstatic.com/images?q=tbn:ANd9GcRgGpvU-T90I9hMaiUGfp_ZPgov7YjZ59krdUumNsuPcr60D8pyyw Most related to crocodilians. Were herbivores, however they demonstrate the skull structure and snout. They looked much like modern day crocodiles except their nostrils were located on the top of their head rather than the tops of their snout. They were alive during the early Jurassic period.

Bipedal. They didn't resemble modern crocodiles in behavior or body shape except the shape of their head. http://www.palaeocritti.com/_/rsrc/1265511132370/by-group/crocodylomorpha/erpetosuchus/Erpetosuchus_sk.jpg

Middle Cretaceous period. 40ft long and 10-15 tons. Ate dinosaurs and fish. Lived in the rivers of Africa. Had an odd protrusion on it's snout. Looked and behaved like it's modern decedents, but it was twice as long and about 10 times as heavy. Bulla on it's snout. Also the media calls it super-croc. http://theevolutionstore.com/modules/store/images/products/sarcosuchus_imperator_supercroc_skull_ss1825_m5364.jpg

Really big; 36 ft. long ten tons. Ate plankton and krill even though they had a hugh pelican like jaw. http://upload.wikimedia.org/wikipedia/commons/thumb/5/58/Stomatosuchus2.jpg/250px-Stomatosuchus2.jpg

Greek for terrible crocodile. Lived in the rivers of North America. About 33 ft long and 10 tons. They had a 6ft. long skull. Fed on fish, shell fish, and land creatures. Evidence in fossils suggests that they attacked large North American tyrannosaurs. http://www.raul-martin.net/raulmartin/new/deinosuchus_n.jpg

It is five feet long, 25-50 pounds, ate fish, and lived in the rivers of North America and western Europe. It had a long narrow profile and a tooth studded snout. It survived the K/T extinction. http://www.sciencephoto.com/image/480158/350wm/C0143829-Skeleton_of_Champsosaurus_natator-SPL.jpg

The K/T Extinction Event was an intense global mass extinction of Flora and Fauna which most notably included the dinosaurs. Strangely, many species of large crocodilians survived the event, evolving into the cute lovable creatures we know today.

The modern day crocodile, which includes the saltwater, Nile, and American variants, is spread throughout the world with various adaptions for specific climates and habitats. Though it looks prehistoric, it is a highly evolved and complex organism that is a successful predator. http://palaeos.com/vertebrates/crocodilia/images/Crocodylidae1.gif

This animal was nine feet long and 500 pounds, and they consume red meat who they hunted in the woodlands. These crocodiles have long curved teeth and long legs, that are unlike the modern croc's short legs. andThe crocodiles continuously get smaller because of environment changes. http://www.qm.qld.gov.au/Find+out+about/Dinosaurs+and+Ancient+Life+of+Queensland/~/media/Images/Find%20out%20about/Dinosaurs/Megafauna/diprotodon-optatum-skull.jpg?w=350&h=265&as=1