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kustom65 — CRETACEOUS ASSAULT

Published: 2009-05-17 04:45:50 +0000 UTC; Views: 11109; Favourites: 185; Downloads: 1
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Description There was a theory going around a few years ago: a noted paleontologist was putting it about that Tyrannosaurus Rex--one of the most utterly monstrous creatures ever to stride the Earth--was no more than an undignified grovelling scavenger.

I disagreed, and was moved strongly to illustrate the point.

Sure, many predators will scavenge if they get the chance, but most of the time they have to hunt. Usually they use the element of surprise, as we see with crocodiles, lions and other cats, eagles, bears, wolves, etc... and as I have shown with T.rex here.

Furthermore, there is always a predator for every grazing animal species, and a TOP predator in every ecosystem. T.rex was the biggest carnivore in its region -- if it wasn't killing the gigantic herbivores, then nothing else could have.

It's fashionable to depict dinosaurs as being very lean, to the point of looking anorexic; but a biped the size of a fully grown T-rex would have required enormous leg muscles in order to lunge from hiding, and to walk at a reasonable pace; powerful legs would also have been necessary to balance the violent flesh-tearing movements of the head and neck during attacks (such as depicted here).

It's unlikely, given its proportions, that the adult creature could have run at appreciable speed -- yet another argument strongly supporting the ambush theory.

I do suspect that younger T.rexes would have been faster runners, and possibly hunted in packs. The monster shown here is an oldtimer, evidently capable of bringing down a Triceratops on its own.

The Attack:
It seems remarkably unlikely that T.rex would have approached Triceratops from the FRONT, although this scenario is often depicted in paintings. It's far more probable that Rex would have lurked in dense foliage and lunged out at the passing horned brute from the side. The Rex in my painting is attempting to pull the trike down for an easier kill; but the trike seems to be responding quickly, wheeling around to gouge his attacker... how will it end?
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Comments: 109

sumoowl [2014-12-31 05:36:58 +0000 UTC]

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kustom65 In reply to sumoowl [2014-12-31 11:49:08 +0000 UTC]

Definitely agree. If T.rex wasn't the top predator, what was? So yes, no argument there.

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sumoowl In reply to kustom65 [2014-12-31 19:21:32 +0000 UTC]

Hidden by Commenter

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kustom65 In reply to sumoowl [2015-01-08 13:18:48 +0000 UTC]

One theory is that the younger tyrannosaurs were the main hunters in a group, and they would herd the prey animals into an ambush by the larger, older tyrannosaurs for slaughter. I wonder if they all really had feathers? Will have to redraw everything if so...!
Thanks again for commenting and faving.

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RenagadeRexRider [2014-11-18 03:11:27 +0000 UTC]

I love the detail you put into what it's hunting characteristics might have been like and for not making it a cretaceous beggar.... beautiful~

One would also think that all a rex might want to do is simply run in, give one well placed bite and leave then wait for its prey to die, then "scavenge" what it did kill. as i think i recall reading that due to the ridges in the fangs it had an ability akin to the modern komodo dragon.

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kustom65 In reply to RenagadeRexRider [2014-11-24 08:03:51 +0000 UTC]

Thanks! I agree with you about the Komodo dragon idea too - septicemia.

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RenagadeRexRider In reply to kustom65 [2014-11-24 08:06:35 +0000 UTC]

There's the word

And no problem^^

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TheMightySaurus [2014-08-14 02:34:51 +0000 UTC]

OPEN THE DOOR! GET ON THE FLOOR! EVERYBODY WALK THE DINOSAUR!      

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moolate127 [2011-05-09 22:48:10 +0000 UTC]

That is how i think the hunting habits of a rex are! If it ran alongside its prey and took a bit out of their hip, would it reaolly need big arms? no. it would hunt like that and eat the food that it killed. it is not a scavenger its the king of dinosaurus

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kustom65 In reply to moolate127 [2011-05-10 09:34:17 +0000 UTC]

Hey, thanks - I agree 100%. It doesn't make sense that even T.rex would tackle a three-horn-faced monster front on!

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moolate127 In reply to kustom65 [2011-05-10 12:40:38 +0000 UTC]

agreed

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RobotNinjaHero [2011-04-27 05:08:45 +0000 UTC]

Spectacular work. I love it

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kustom65 In reply to RobotNinjaHero [2011-04-27 07:30:49 +0000 UTC]

Hey, thanks!!

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RobotNinjaHero In reply to kustom65 [2011-04-27 18:00:01 +0000 UTC]

Your welcome.

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VipertheWyvern [2011-02-24 15:02:10 +0000 UTC]

wow awesome

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Psithyrus [2010-08-03 23:59:19 +0000 UTC]

I love how the commotion between predator and prey is tearing up the foliage!

Thanks for sharing,

Blair

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kustom65 In reply to Psithyrus [2010-08-04 14:50:25 +0000 UTC]

Thanks for the cool comment + faving!

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pharmmajor [2010-06-28 15:52:54 +0000 UTC]

I think Calvin put it best; The T-Rex was a predator because "They're so much cooler that way."

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Old-PaleoClipper [2010-06-28 15:09:21 +0000 UTC]

Not to mention their are specific suture lines in the lower jaw of a rex that are only seen in active hunting dinos (and modern reptiles as well) they are used to absorb the shock of struggling prey.
No doubt that rex would have scavenged if there was something there, same as any modern hunter will do, but given build and skeletal details, it was most definitely an active hunter.

Have you heard the recent "discovery" (if you can call it that...) that Trike was omnivorous?!



Regardless of my ramblings, very nice image.

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MugenSeiRyuu [2010-05-02 12:12:24 +0000 UTC]

Pure Hunters or Scavengers are very rare. Look at Lions and Hyenas. They are both.

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kustom65 In reply to MugenSeiRyuu [2010-05-02 13:28:19 +0000 UTC]

Exactly -- most carnivores will scavenge if the opportunity arises. It's the path of least resistance.

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MugenSeiRyuu In reply to kustom65 [2010-05-02 23:23:27 +0000 UTC]

Yep. The life of a Carnivore is already dangerous enough, so why should they take extra risks if there is already food? Every hunt is risky.

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hyphenatedsuperhero [2010-04-21 20:14:21 +0000 UTC]

Faved! Not only because of the amazing confrontation you depicted, which is very retro by the way, but because of the plausible explanations given and (most of all), because I share your opinion.
Jack Horner is an ass. Not only that, he's a nutjob. Sure, he found the Egg Mountain fossil site and formulated the likely theory that dinosaurs were in fact thoughtful parents, but that doesn't mean everything he spits out must be treated as factual science. Especially in a field with such a wide margin for error as paleonthology. Besides, as Bill Watterson put it through his adorable character Calvin, "T-Rex is much cooler that way [being a predator]".

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kustom65 In reply to hyphenatedsuperhero [2010-04-22 07:28:34 +0000 UTC]

Thanks!!! There sure are some bizarre hypotheses about dinosaurs out there... The T.rex/scavenger is probably the nuttiest one I've heard. I'm also very skeptical of claims that sauropods never entered the water at all -- they seem to go from one extreme to the other.

Thanks again for your good words!!

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hyphenatedsuperhero In reply to kustom65 [2010-04-22 15:52:21 +0000 UTC]

Yeah.
Sometimes I feel like people keep forgetting these were animals we are talking about, and probably did everything modern animals do. Just as there is no exclusively scavenging large carnivore in our days, there are no exclusively terrestrial large animals. All of them are fond of the water.
You're welcome!

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kustom65 In reply to hyphenatedsuperhero [2010-04-24 01:54:47 +0000 UTC]

RIGHT ON!

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ShadoweliteX [2010-04-21 17:49:07 +0000 UTC]

And amazing drawing with very good details, well done. And the colours are perfect, It actually looks very prehistoric keep it up

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kustom65 In reply to ShadoweliteX [2010-04-22 07:23:47 +0000 UTC]

Thanks for the awesome comments -- fantastic encouragement there, much appreciated!

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ShadoweliteX In reply to kustom65 [2010-04-24 00:26:34 +0000 UTC]

Not a problem buddy, you have a really amazing talent with this kind of work. Please don't stop. 8D

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kustom65 In reply to ShadoweliteX [2010-04-24 02:45:01 +0000 UTC]

Hey, thanks again -- you've really made my day, and motivated me to pick up my new Wacom and get to work! All the best!!

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ShadoweliteX In reply to kustom65 [2010-04-24 15:10:32 +0000 UTC]

Not a problem, I'm very glad you decided to do some more work ^.=.^ I'm sure everyone will enjoy it as much as they liked this one.

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grobles63 [2010-04-03 04:07:48 +0000 UTC]

Great job on this well thought out piece. Love going through the comments and learning from you and those that commented.

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kustom65 In reply to grobles63 [2010-04-03 06:01:39 +0000 UTC]

Thanks Grobles! I checked out your art too, you're doing some amazing work there! All the best in your endeavors~!

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dA-Jack [2010-02-18 01:55:40 +0000 UTC]

Is this an painting?, perhaps digital work?, very neat piece i really like it.

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indigomagpie [2010-02-02 12:36:06 +0000 UTC]

This argument always makes me think of spotted hyaenas, which have incredibly powerful bone-crushing jaws, and are damn good hunters AND damn good scavengers. The two aren't mutually exclusive!

(Mind you, they're long-distance runners, so the comparison falls over at that point...)

There's been evidence found for hunting and for scavenging in tyrannosaurs. Cerotopsian and ornithopod fossils have been found that had their tail bitten by something VERY BIG with VERY BIG TEETH - must have been T. rex, nothing else around was big enough - managed to get away, and lived long enough for the wound to heal. On the other hand, those big bonebeds of ceratopsians who starved to death have quite a few tyrannosaur bite-marks and shed teeth.

The other argument against pure-scavenger tyrannosaurs is that flightless scavengers, particularly endotherms who need to eat a lot, aren't all that practical. (And I feel safe in calling tyrannosaurs endothermic, or pretty close - there's no way they had a Komodo dragon metabolism.) There are only two flightless land animals around at the moment who are specialised for scavenging without being equally good at hunting or omnivory. That's the striped hyaena and the brown hyaena. They're rare and they're small, much rarer and a third the size of their more proactive cousin, and I have no idea how a tyrannosaur could find enough carrion to keep itself going.

Personally, I find predator/scavengers cooler than straight predators. Keeps the "ooh!" factor while adding a nice dose of pragmatism.

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kustom65 In reply to indigomagpie [2010-02-06 14:38:50 +0000 UTC]

Thanks for those excellent comments.

Tday I read an hilarious comment by the Creationist Kent Hovind -- he said this in all seriousness:

"In spite of their ferocious look, many people would probably argue the T-Rex was a vegetarian. The ferocious teeth would have been great for, you know, crushing stuffed pumpkins or something, you know. I don't know if it has ever been proven they were meat eaters."

Incidentally, this guy is currently locked up for ten years -- for tax evasion, not sheer insanity!

So there are zanier views than T.rex was an obligate scavenger!

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yoult In reply to kustom65 [2010-02-26 03:28:45 +0000 UTC]

Tyrannosaurus the gentle herbivorous... Never heard about that

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kustom65 In reply to yoult [2010-02-26 03:41:32 +0000 UTC]

I did -- there's one guy who claims T.rex ate pumpkins on Noah's Ark!!!

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yoult In reply to kustom65 [2010-02-26 15:14:25 +0000 UTC]

Cruel Creationists...

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SetoKaibaBlue-Eyes [2009-11-29 06:45:21 +0000 UTC]

Whoa!!
this is totally awesome picture!!
Im gonna fave this, totally!!

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The-Doomsday-Brit [2009-10-29 21:23:30 +0000 UTC]

Very impressive work, I find the T-rex's eye to be the most intriguing part of the piece; wild, primal, fearsome

and in defense of the scientists and paleontologists that say T-rexes are scavengers, I can see how the extreme sense of smell (for finding corpses) Bone crushing teeth (for crushing bones to maximize nutrition gain, and large size (for intimidating other, smaller scavengers) could point to the creature being a scavenger.

I do somewhat believe they are scavengers, though that does nothing to diminish it's primal fearsomeness. In fact I rather like that view; the Scavenging King, it's not the greatest predator of all time, but it's still a extremely awe-inspiring creature.

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kustom65 In reply to The-Doomsday-Brit [2009-10-30 01:21:29 +0000 UTC]

Thanks Doomsday! I changed the eye on T.rex before I was finally happy with this finished version.

I must admit, I did find the scavenger idea interesting at first -- the concept of a gigantic turkey buzzard seemed pretty cool!

And I do think T.rex was a scavenger when the opportunity was there (like most modern carnivores) but certainly more than capable of bringing down any huge prey animal whenever he felt like it!

Another intriguing possibility promoted by Curry et al is that the younger, smaller T.rexes were the hunters in the family, chasing the prey into an ambush by the gigantic older members.

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The-Doomsday-Brit In reply to kustom65 [2009-10-30 01:37:24 +0000 UTC]

And interesting theory, seems rather likely given that the younger ones would be more agile, only issue would be the brain-power involved to create that sort of tactic

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kustom65 In reply to The-Doomsday-Brit [2009-10-30 01:45:07 +0000 UTC]

Good point about the brain power. Still, even crocodiles are somewhat strategic in their hunting, and they take good care of their young.

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WanderingAlbatross [2009-10-29 18:57:05 +0000 UTC]

I'm not sure I believe the scavenger label either...but who knows. Maybe it did both. Nice pic either way

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kustom65 In reply to WanderingAlbatross [2009-10-30 01:21:46 +0000 UTC]

Exactly -- it did both.

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WanderingAlbatross In reply to kustom65 [2009-10-30 03:02:48 +0000 UTC]

Now here's the next annoying question that people continuously debate over...could it run, or only lumber along?

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kustom65 In reply to WanderingAlbatross [2009-10-30 03:25:48 +0000 UTC]

Biomechanical analysis shows that adult T.rex did not run at much more than 15 mph, if that. The speed at which an animal runs is determined by the mass and construction of its leg muscles, not the overall size of the animal per se.

For adult T.rex to have been a fast runner its leg muscles would have had to have taken up 65 per cent of its body weight -- a mathematical and biological impossibility.

So a bit of a lumberer, but undoubtedly the smaller ones would have been a lot more agile and could have run any of us down, I reckon!

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WanderingAlbatross In reply to kustom65 [2009-10-30 15:21:57 +0000 UTC]

Again we are in agreeance . In my eyes the case is closed...seems that alot of people still romantically hope the things could sprint to chase things down.

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HellraptorStudios [2009-10-29 15:01:42 +0000 UTC]

love this one, graphic and beatiful in the same time

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