Troodonts

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The Troodonts are a group of paravina, in general they were small and not fierce.

The oldest troodonts date to the late Jurassic period and the last

died-out during the K/T extinction.

Troodonts remains are found on all northern hemisphere continents.

Facts

During most of the 20th century, troodontid fossils were few and scrappy and they have therefore been allied, at various times, with many dinosaurian lineage, particularly Pachycephelosaurs. More recent fossil discoveries of complete and articulated specimens (including specimens which preserve feathers, eggs and embryos, and complete juveniles), have helped to increase understanding about this group. Anatomical studies, particularly studies of the most primitive troodontids, like Sinovenator, demonstrate striking anatomical similarities with Archaeopteryx and primitive dromaeosaurids, and demonstrate that they are relatives comprising a clade called Paraves.

Troodon.

Troodonts also have the retractable claw on the second toe of each foot, just like Dromaeosaurs, except smaller and less sharp.

In Walking with... series

Walking With Dinosaurs 3D

Troodon played a minor but important role in the film. One of them caught and tried to eat Patchi, but was scared away, leaving Patchi with a hole in his crest instead.