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T REX by CorazondeDios T REX by CorazondeDios
T REX

Houston Museum of Natural Science


T. rex: Scavenger or Predator?
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A current topic in paleontology that has received much popular press is the question of whether T.rex (or other Tyrannosauridae in general) were predators or scavengers. Let's explore this issue.
Paleontologist Jack Horner of the Museum of the Rockies (Bozeman, MT) has proposed that T.rex could not have been a predator. His arguments against predation include its small eyes (needed to see prey), small arms (needed to hold prey), huge legs (meaning slow speed) and that there is no evidence for predation bones have been found with tyrannosaur teeth embedded in them or scratched by them, but so far no study has shown that tyrannosaurs killed other dinosaurs for food (a bone showing tyrannosaur tooth marks that had healed would be strong evidence for predation).

His evidence supporting scavenging include its large olfactory lobes (part of the brain used for smell), and that its legs were built for walking long distances (the thigh was about the size of the calf, as in humans). Vultures have large olfactory lobes and are good at soaring to cover long distances.

There are arguments against scavenging. Most large living predators (such as lions and hyenas) do scavenge meat happily when it is available, but most do prefer fresh meat. Horner argues that its arms were too weak to grab prey, but sharks, wolves, snakes, lizards and even many birds are successful predators without using their forelimbs (if any). Whether T.rex was a slow animal is tough to tell, as our dinosaur speeds page will tell you.

What is the public to think of all this? It is suggested that you make up your own mind; the fact is that reconstructing the behavior of extinct animals is difficult, especially when there are no close modern relatives with which to compare them. Tyrannosaurs may have been scavengers, predators or both; Horner is merely presenting an opposing argument that shows that we are not yet 100% sure what ecological niche the great tyrannosaurs filled.
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:icondovahkiinhu3br:
DovahkiinHU3BR Featured By Owner Aug 24, 2015
This is an allosaurus.
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:iconsniper0092:
Sniper0092 Featured By Owner Apr 18, 2013  Hobbyist Traditional Artist
THat looks like a allo.
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:iconbear48:
bear48 Featured By Owner Jan 28, 2011  Professional
so very cool
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:iconnijunava:
nijunava Featured By Owner Oct 31, 2010
technically this shouldn't be in the predator club T-REX was actually a scavenger.
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:icondovahkiinhu3br:
DovahkiinHU3BR Featured By Owner Aug 24, 2015
io9.com/finally-actual-physica…
And really, your broken teeth theory does not make sense because t-rex was not like mammals. It had "replacement teeth" (or whatever they are called) that were always "ready for action", but these were above the upper jaw's teeth and under the lower jaw's teeth. "Why" because if one tooth somehow got broken, a 100% complete and new tooth would replace it.
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:icondovahkiinhu3br:
DovahkiinHU3BR Featured By Owner Aug 24, 2015
A triceratops skull was found and 1/4 of one of the horns was missing. Only t-rex could have done that.
And also the same skull showed bite marks on the skull shield, BUT THESE SHOWED SIGNS OF BONE REGROUTH. There is only one explanation for this: the triceratops was ATTACKED by a t-rex, and lived to tell the story. This is a positive proof that t-rex was both a hunter and a scavenger.
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:iconcorazondedios:
CorazondeDios Featured By Owner Oct 31, 2010
you know, I wondered about that. But then so should the Bald Eagle. A lot of predators are opportunistic feeders and will scavenge when possible.

I really don't think a beast the size of a T Rex was solely a scavenger. It would not have been able to find that many large dead dinosaurs lying around for it to even reach adulthood. I am positive it was also a predator. Otherwise, why would it need such large powerful hind legs if not for pursuing something? You dont chase dead things. Also, if its just eating rotting stuff, you dont need huge teeth for rending soggy dead flesh. It was a predator for sure, also.
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:iconnijunava:
nijunava Featured By Owner Oct 31, 2010
i watched a hour and a half show soleley about weather or not the t-rex was a scavenger or predator and it was years ago so i dont remember all the details but it had something to do with the bone lenghths in the hind legs that scavengers had one longer than the other while predators had the oposit. the T-rex also has very large nasal pasages sugesting it had a verry strong sense of smell to find carrion. also if a trex fell over it would sustain life threatening injuries and its front legs would have no hope of breaking the fall so they arent thought to have ever run only walk. the reason they have such powerfull back legs is because they need to hold up their entire body on those two back legs and they weighed a lot. also they found lots of the tyranasaurs teeth to be broken so they beleive that it had to eat lots of bones for nourishment out of necesity thus damaging its teeth from all this i conclude that it is a scavenger..... why cant i ever right crap this good for school work....
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:iconcorazondedios:
CorazondeDios Featured By Owner Nov 1, 2010
sorry, I don't believe you. I am sure I am right. You should go research again. what you wrote there is pure BS -- one leg longer than the other for scavenger or predator. you are talking out of your hat. always study and research -- get the latest data. think about it -- how could a scavenger grow to such large proportions? Look at current scavengers. Look at their size.

I am sure the T rex could right itself with leveral from its huge tail. You need to study more. If you think you are right, than just google it and back up what you say with credible links. So far, I'm not buying any of it.
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:iconnijunava:
nijunava Featured By Owner Nov 1, 2010
no not leg the bones in the leg
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:iconcarmel12:
Carmel12 Featured By Owner Oct 31, 2010  Hobbyist General Artist
Awesome!
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:iconcorazondedios:
CorazondeDios Featured By Owner Oct 31, 2010
thanks!
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