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T. rex's Eating Habits
The information we have to go on with respect to the eating habits of T. rex
are what the fossils of T. rex tell us about the animal, what we know about
the Cretaceous environment, and what we know about our current environment.
A synthesis of this information (at least what I know of it) leads me to
T. rex had large jaws full of razor-sharp teeth, it had long, strong legs,
it had binocular vision, and it had long, sharp talons. If it was an
obligatory scavenger it would require none of these tools. A good sense of
smell would be about all it would need. Animals in our current environment
with tools like these are primarily predators, ie. lions, wolves, tigers.
But, just because they have these tools and frequently kill animals larger
than themselves does not mean they won't eat carrion or someone else's kill.
Why pass up a free meal? It also does not mean it would ignore small animals
as a meal. Wolves frequently eat considerable numbers of mice, and the size
ratio between them is enormous. If you eat enough mice you don't have to
take a chance on getting your ribs stove in by a moose. So, why wouldn't a
cruising T. rex try to snarf down a much smaller dinosaur if given the
opportunity? The problem seems to be with people assumming a single
"lifestyle" for animals. Our current predators are highly variable in
selecting food items, why not T. rex?
Toxic Chemicals Biologist by necessity,
By-stander and Observer of Paleontology by interest