Troodon

Troodon (name meaning "wounding tooth") is a genus of troodontid theropod dinosaur that lived in North America during the Late Cretaceous period.

Portrayal in the series
Much like its earlier cousin, Mei long, Troodon are shown as intelligent and opportunistic pack hunters. They live together in groups and appear to operate together to ensure that their prey is brought down. They also utilize this tactic when a predator is seeking to steal their kill, as shown when several individuals move in to steal Nigel's bait meat while others distract him.

Supercroc
A Troodon is first encountered heading towards Nigel's jeep, with more already there feeding on meat meant to be used as bait for a Deinosuchus. Nigel scares them away with a bike horn. That night, the remaining bait is left without anyone right next to it, as Nigel hopes to trap a Deinosuchus. A Troodon take the chance to steal it.

Later, when Nigel is bringing a Deinosuchus  back to the park, a Troodon manages to sneak into the back of his jeep to eat what's left of the bait meat. After they all make it to the present, Bob is picking up Nigel's mess with the jeep when the Troodon pops out of the back and startles him. This causes Bob to lose control of the vehicle and crash into one of the park's titanosaurs, spooking it and causing it to go on a rampage. As Bob gets out of the jeep, the Troodon escapes into the woods. Later, Nigel spots the Troodon chasing a park worker over the security cameras. Weeks later, Bob manages to capture the Troodon and names him Rascal.

Trivia

 * The Troodon model is a recolored Mei long model.
 * The scene where Nigel scares a pack of Troodon off with a blow horn is likely a reference to the documentary Chased by Dinosaurs, in which Nigel scares away a pack of Velociraptors that were attacking him.
 * Troodon and troodonts, in general, were actually omnivores, not pure carnivores.

Errors

 * Troodon were shown to only have a coating of feathers in the series, but in reality, they also had wings and a tail fan.
 * Like other theropods, Troodon didn't have pronated hands, so they couldn't bend their wrists far downwards without breaking them.
 * It's highly likely that Troodon had a owl-like ring around its eyes.
 * Troodon has recently had most of its assigned specimens moved into other genera, leaving only the holotype tooth as merit to the genus.
 * There is no evidence that Troodon, or any troodontids, lived in Texas. They lived in the northern US and Canada.