|Scientific name :||Troodon formosus|
|Time period :||Late Cretaceous 135-65|
|Primary diet :||Omnivore|
|In the series|
|Fatalities caused :||Some Tyrannosaurus rex Eggs|
|Appearances :||End Game|
Physical Characteristics Edit
Troodon were small dinosaurs, up to 0.9 metres (3.0 ft) in height, 2.4 metres (7.9 ft) in length, and up to 50 kilograms (110 lb) in mass. The largest specimens are comparable in size to Deinonychus and Unenlagia. They had very long, slender hind limbs, suggesting that these animals were able to run quickly. They had large, retractable sickle-shaped claws on the second toes, which were raised off the ground when running.
Their eyes were very large (perhaps suggesting a partially nocturnal lifestyle), and slightly forward facing, giving Troodon some degree of depth perception.
Intelligence, Brain, and Inner Ear EditTroodon had some of the largest known brains of any dinosaur group, relative to their body mass (comparable to modern birds). Troodon's cerebrum-to-brain-volume ratio was 31.5% to 63% of the way from a nonavian reptile proportion to a truly avian one. Troodon had bony cristae supporting their tympanic membranes that were ossified at least in their top and bottom regions. The rest of the cristae were either cartilaginous or too delicate to be preserved. The metotic strut of Troodon was enlarged from side-to-side, similar to Dromaeosaurus and primitive birds like Archaeopteryx and Hesperornis.
Scientists at a British university later conducted a thought experiment related to the evolution of Troodon, had it not been so brutally wiped out by the cataclysmic meteorite impact of 65 million years ago. The scientists discovered that, as Troodon's eyes grew, his head would have to frequently bend upwards to gain better at sight. The problem was to change the angle at which the spine was to the ground, in other words, to become erect. With Troodon standing upright, there would be no need for a tail to act as a counterbalance, henceforth reducing the requirement for a tail. Troodon had become humanoid. Although this is just a thought experiment, it really does give a fascinating glimpse of what evolutionary paths certain lineages of dinosaur may have taken to, had they not been eradicated. This little carnivore was a relative of Saurornithoides, another type of Troodontid.End Game, a group of Troodon raided a Tyrannosaurus nest, and one paid the price by being killed. Later after the asteroid hit they were one of the only non-avian dinosaurs to survive, but when the nuclear winter hit, one of the last ones took the last egg and hid in one of the frozen corpes of a juvenile Tyrannosaurus, which, in turn, will inherit the next generation of dinosaurs, and the birds will continue the Dinosaur Revolution.
The presence of troodon in late maastrichtian areas is now thought to be wrong with the resurrection of the validity of a related species pectinodon, so troodon probably did not live there.