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Troodon
TIME: Late Cretaceous
LOCALITY: North America (Alberta)
SIZE: 6 ft 6 in/2 m long
This was the "brainiest" dinosaur of them all
the brain cavity in the skull is, relative to
its body size, the largest so far discovered.
Its brain was larger than that of a modern
emu. Comparing it to that of a mammal,
scientists reckon that Troodon was about as
intelligent as one of the less-intelligent
modern mammals, such as an opossum.
Only incomplete skeletons of this troodont
have been found. It seems to differ little in
structure from Saurornithoides, leading some
paleontologists to think that it is actually
the same animal. However, the clawed fingers
of the Troodon specimens seem longer and
slimmer than those of Saurornithoides.
Also, Troodon was probably of a lighter
overall build; it is estimated to have
weighed between 60 and 100 lb/27 and
45 kg.Like other members of its family,
Troodon possessed a large brain and large
eyes--each eye was about 2 in/52 mm across,
the same size as that of a modern ostrich.
Combined with its slim build, these features
would have made it an agile runner and a
night hunter, with fast reflexes and
well-developed senses.
Subject by: Russell Webb