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Ornitholestes

Ornitholestes lived:155 to 145 million years ago in the Late Jurassic period.

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Animal Type: Dietary Type: Size: Weight: Major Fossil Finds:

Ornitholestes or-NITH-oh-LESS-teez Bird robber Dinosaur (theropod) Carnivore - lizards, eggs and small mammals Up to 2.5 metres long Up to 12 kilograms Wyoming, Utah and Colorado, USA

Evidence A partial skeleton including the skull and jaw of Ornitholestes was discovered in 1900 at Bone Cabin Quarry in the Morrison Formation of Wyoming. This is the only specimen apart from an incomplete hand from another individual.

Ornitholestes was very closely related to the evolutionary line that produced the birds. It had wrists that allowed it to tuck its hands up close to its body in the same way a bird holds its wing.

It was a "lizard-hipped" dinosaur with light, hollow bones and a close relative of Coelophysis. It was an agile two-legged predator and its long tail gave it great manoeuvrability and balance for hunting. Its head was relatively small and short with sharp, conical teeth and a little crest on the top of its nose.

It was small enough to live deep in the forest. It fed on lizards, small mammals and carrion. It could grab these with its strong hands that had 2 long clawed fingers and one short one.

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