Deinosuchus

The "deino" in Deinosuchus is the same as the "dino" in dinosaur, connoting "fearsome" or "terrible." In this case, the description is apt: Deinosuchus was one of the largest prehistoric crocodiles that ever lived, attaining lengths of about 33 feet and weights in the neighborhood of 5 to 10 tons. In fact, this late Cretaceous reptile was once thought to be the largest crocodile that ever lived, until the discovery of the truly monstrous Sarcosuchus put it firmly in second place. (Ancient crocodiles were constantly growing--in the case of Deinosuchus, at the rate of about one foot per year--so it's hard to know exactly how long the longest-lived specimens were.)

Appearance
It had large, robust teeth that were built for crushing, and its back was covered with thick round bony plates. One study indicates that Deinosuchus may have lived for up to 50 years, growing at a similar rate to that of modern crocodilians, but maintaining this growth over a much longer period of time.

Although Deinosuchus was far larger than any modern crocodile or alligator—measuring up to 12 m (40 ft) and weighing up to 8.5 metric tons (9.4 short tons)—its overall appearance was fairly similar to its modern relatives.

Behaviour
Amazingly, the preserved fossils of two North American tyrannosaurs--Appalachiosaurus and Albertosaurus--bear evidence of Deinosuchus bite marks. It's not clear if these individuals succumbed to the attacks, or went on to scavenge for another day, but you have to admit that a 30-foot long crocodile lunging at a 30-foot long tyrannosaur makes for a compelling picture! (If it did in fact prey on dinosaurs on a regular basis, that would go a long way toward explaining the exceptionally large size of Deinosuchus.)

Other than its enormous proportions, Deinosuchus was remarkably similar to modern crocodiles--an indication of how little the crocodilian line of evolution has changed over the past 100 million years.

In Prehistoric Park
In the park, near the Time Portal site there is a crocodile enclosure. There is a suspension bridge across it (the simple sort where the footway follows the catenary); Bob walks across it to feed the Nile crocodiles in the lake. Nigel plans to add a Deinosuchus, an ancient species of giant crocodilian (more closely related to alligators than crocodiles) which weighs up to 9 tons, to the park. Bob mutters that Nigel may have bitten off more than he can chew this time.

Nigel, with binoculars, sees 5 Nyctosaurus fly in from the sea. They fish by skimming the lower jaw through the water surface. Nigel has brought a microlight with him: he uses it to fly with the Nyctosaurus. A Deinosuchus reaches its head out of the sea and grabs one of the Nyctosaurus. Nigel sees another Deinosuchus swimming from the sea up a river, and decides to head in that direction.

On site, Nigel paddles in a red inflatable boat on the river. A Deinosuchus bites the boat's stern, does not like the taste of rubber, and lets go. It snaps out of the water again by the boat, then disappears. Nigel paddles two miles upstream to a freshwater lake, where he sees some Deinosuchus on a sandbank, and a herd of Parasaurolophus forced by thirst to come to the lake to drink. Nigel paddles. He mentions that Deinosuchus will (geologically) soon be wiped out when sea floods the area, as they have a specialised lifestyle, so he must rescue one. An unwary young Parasaurolophus goes to the lake to drink. A Deinosuchus rockets out of the lake and grabs it by the chest. The two roll over and over in the lake. More Deinosuchus swim in. They take turns to hold the kill while another tears at it.

On site, Nigel plans to use the rest of his meat to bait a Deinosuchus up the stockade. He sets the bait at the stockade's end. They rig hammocks. It gets dark. With their helmet headlights they see that some a Troodon was pulling away his bait. When Nigel chased after it, another came and ran off with the rest. The meat that was left was not enough to lure a Deinosuchus. They go to bed.

They are woken in the morning by the noise when three Albertosaurus kill a Parasaurolophus. Three Deinosuchus come out of the lake to steal the kill. There is noisy confrontation and some biting, and tugs-of-war over the flesh. The Albertosaurus admit defeat and back off.

On site, Nigel must use himself as bait. He wades into the water and splashes it hard with a paddle until a Deinosuchus investigates. He backs off too soon; the Deinosuchus backs off. He splashes again. The Deinosuchus charges out of the sea and chases Nigel, who runs up the stockade path and at its blind end squeezes between two of its posts. He and 4 men with him struggle to hold the stockade posts upright, until the Deinosuchus tires, as cold-blooded reptiles tire quickly. They set up the time portal close outside the blind end of the stockade. Nigel in the jeep tows three of the end stockade posts out and through the Time Portal; the Deinosuchus is confined too closely to turn round, so it must follow him through the portal. It is enticed with a piece of meat to its pond (made close by the time portal), which it goes into.

In the park Bob as usual has to "pick up the pieces". He drives the jeep to his next job, and mutters that Prehistoric Park needs more keepers, as they have so many problems: the Phorusrhacos escaped its enclosure again; the Smilodon cubs have had Suzanne up half the night, the titanosaurs eat too much, and to make matters worse, their digestive systems cannot handle the modern vegetation resulting in bad diarrhea, and Nigel constantly bringing back more creatures is not helping. Suddenly, a Troodon emerges from the kit on the back of the jeep: enticed by the meat in the jeep intended to lure the Deinosuchus, it has stowed away. It snaps at Bob, and the swerving jeep runs straight at a titanosaur, causing it to stampede through several enclosures, causing the Ornithimimus flock, Phorusrhacos, Elasmotherium, and, worst of all, Matilda the Tyrannosaurus, to flee through the broken fences and run around freely through the park. Paying no attention to the titanosaur lumbering through her enclosure, Matilda walks right out into freedom, getting the scent of an easy meal. Bob manages to stop the jeep, and the Troodon leaps out and escapes into the undergrowth nearby. Bob runs off to try to capture the escapees. When trying to round up a group of escaped Ornithomimus and the Elasmotherium, Bob is warned that Matilda is on the loose and closing in on him, so he must flee. Matilda then heads for the elephants – she separates the calf from the rest of the herd and quickly runs it to the ground. But Martha, although the herd earlier drove her away, instinctively defends the calf, and with some trumpetings, growls, roars, and waving of tusks, her attack stops Matilda. Nigel then arrives and runs away on foot, trying to lure Matilda away to follow him. Matilda, seeing the prospect of an easy meal, turns away from Martha and starts chasing Nigel. Matilda barely managing to evade the Deinosuchus' attack.

Nigel runs past the Nile crocodile pond, across an open area, and along a jeep track past the Deinosuchus lake, with Matilda closing the gap behind him. The Deinosuchus, accustomed to fighting giant theropods, surges out of the lake at Matilda, who swings around just in time to dodge the attack. This delay buys time for Nigel, who runs into the Time Portal's entry stockaded enclosure and climbs out of it by a ladder. Matilda's jaws are only about a foot distance from one of his feet as he climbs to safety. Nigel shuts the enclosure and Matilda is contained.

Deinosuchus Dip
Main article: Deinosuchus Dip

In the park, a crocodile lake has been made near the Time Portal site. The lake appears artificial with small islands and a foot suspension bridge across it, the simple sort where the footway follows the catenary. The Deinosuchus pond is nearby and is almost identical.