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Utahraptor ostrommaysorum by Teratophoneus Utahraptor ostrommaysorum by Teratophoneus
Utahraptor is the biggest of all dromaeosaurids.It was 6-7 metres long( some undescribed fossils may belong to an animal 11 metres long!) I took the mesurements or an animal,6 metres longs. The tail feathers werent included or the measurement, so the animal is a little bit longer ,around 6,5 to 7 metres. This would be around the actual lenth of a utahraptor.
Utahraptor lived in North Americaand was a very dangerous predator. It proabybly lived in packs and hunted even large sauropods like astrodon.Utahraptor means utah -thief and it had rather small teth with a less sharp serration on its teeth. So they were more for grabbing meat. Its oot claw on the second toe was hige,around 24cm long.
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:iconfleeting-epiphany:
UtahRaptor was indeed, the baddest of the bad!

It could reach a height of 'four' meters and a length of 'seven' meters. They were the largest and most intelligent of all the Dromaeosauridaes. In my professional opinion (due to their large size and that they hunted in packs) aside from the arrival of humans - Utahraptors were 'pound for pound' the most dangerous terrestrial apex predator of all time!

You would not want to face down one of those.
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:iconteratophoneus:
Teratophoneus Featured By Owner Jun 24, 2015
dont miss my latest utahraptor, it will come out either today or tomorrow, it will be in colour and a lot more accurate than this one (also more threatening looking :D)
And yes, I wouldnt wanna meet one in a  dark alley :D
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:iconfleeting-epiphany:
Fleeting-Epiphany Featured By Owner Jun 28, 2015
You bet!!
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:iconelithedinoguy:
EliTheDinoGuy Featured By Owner Edited Dec 28, 2014  Student General Artist
Your picture's used in this news article, that's pretty cool! m.ksl.com/index/story/sid/3234…
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:iconltdragooniii:
LTDragoonIII Featured By Owner Feb 16, 2014
Nice!
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:iconsilverdragon234:
SilverDragon234 Featured By Owner Apr 5, 2013
Aye. 36 - 38 feet is a pretty big length for this raptor with 5x the smarts of an elephant. weights for adults of the lengths mentioned range from ¾ to 1¼ tonnes - slightly lighter than a Masai giraffe
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:icongrroselli:
grroselli Featured By Owner Mar 10, 2013
that's one big bird!
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:iconbeingthelight:
BeingTheLight Featured By Owner Feb 23, 2013
The most Vulnerable moment in a human's life: After Happy Hour.
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:iconckdinomite65:
CKDinomite65 Featured By Owner Jul 26, 2012
Imagine they show some of these guys in the fourth Jurassic Park film.
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:iconsaberrex:
Saberrex Featured By Owner Jun 3, 2012  Hobbyist General Artist
what's really scary is that utahraptor would pin his prey down, and eat it alive, using those claws like an eagle to impale prey to the ground.
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:iconfleeting-epiphany:
Semi-true.

While it would have held its prey down with those large, sickle like claws, its unlikely that they would eat it alive. Although wounded and subdued, large prey such as 'Hadrosaurids' could still deliver for one, nasty kick from those massive hind legs. It's likely that Utahraptors hunted in prides, much like todays lion. The fastest and smallest of the pack would chase down a heard - creating confusion and panic, in order to separate the young and weak from the more aggressive animals. The largest of the pride members would wait 'in ambush' for the foolhardy and inexperienced (lets say calf) to tread its path and away from the safety of the heard. With the trap set, they would then pounce and use those sickle like claws to hold it down, while biting down on the preys muzzle, so to suffocate it. 

They wont eat it until its dead and safe to gorge.
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:iconsaberrex:
Saberrex Featured By Owner Jun 26, 2015  Hobbyist General Artist
There isn't much evidence yet for pack-hunting for Utahraptor (at last not until we know more about the find involving a Hippodraco and two or possibly even a family of Utahraptor caught in thick mud). But the RPR (Raptor-Prey-Restraint) method does fit in with the animal's morphology. Also, your theory of dromaeosaurids acting like lions really does not fit. They are not built to suffocate prey with their jaws. They do not cooperate on the same level, and younger individuals would not have behaved in such a way as to drive prey into the clutches of heavier adults. they don't wait for their prey to die before eating it. they would rip it apart while it's still alive, just like a hawk or an eagle, and Utahraptor wouldn't aim for only the throat; they rip into the guts, they bite and slash the flanks, and the tail. Any of those areas would be a crippling blow. The victim can kick and flail all it likes, but if Utahraptor (or a mated pair of Utahraptors (which likely would be monogamous like eagles are)) had a grip on it, it wasn't going anywhere. death would come slow and painful and the victim would still be alive as it was eviscerated and eaten. not pretty, not clinical, but ruthlessly efficient.   
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:iconfleeting-epiphany:
Fleeting-Epiphany Featured By Owner Jul 30, 2015
Strong argument, although 'modern raptors' are not true dinosaurs but a separate branch of predatory birds that had evolved from them. I'm not certain that we can compare the gulf of 65 million years between their eating habits. However, we may study the behavior of 'modern raptors' like a window to the past.

Also, it has been proven by paleontologists that Utah Raptors did indeed hunt in packs.

Thanks for your insight!
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:iconsaberrex:
Saberrex Featured By Owner Jul 30, 2015  Hobbyist General Artist
You mean the six found with the hippodraco? i read about that.
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:iconlordofstamps:
LordOfstamps Featured By Owner Aug 20, 2014
Actually it didn't inspire the Jurassic Park raptors. Utahraptor was discovered AFTER the film was made. Deinonychus seems to be the main inspiration for the Jurassic Park raptors.
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:iconherofan135:
herofan135 Featured By Owner May 4, 2012  Hobbyist Traditional Artist
So cool! Love the feathers! :D
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:iconsvenimal:
Svenimal Featured By Owner Feb 7, 2012   Photographer
Alter Falter! Geniale Arbeit!
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:iconteratophoneus:
Teratophoneus Featured By Owner Feb 8, 2012
danke vielmals :D
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:iconaspieomnipintent:
aspieomnipintent Featured By Owner Feb 7, 2012
stand asife velociraptors, theres a new raptor in town
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:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Feb 5, 2012  Professional General Artist
Ja der gefällt mir =D
Vorallem die Schnauze ist sehr nahe am Fossil dran. Ich glaube du musst noch etwas an den Flügeln und Beinen arbeiten. Ich stell morgen oder heute noch ein paar Bilder rein wie du so was verbessern könntest =)
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:iconteratophoneus:
Teratophoneus Featured By Owner Feb 6, 2012
ja mit den armen bin ich bei dem hier auch nicht ganz zufrieden....
Aber trotzdem vielen dank, ich find auch das der kopf mir dieses mal ganz gut gelungen ist. Utahraptor war für mich schon immer ne herausforderung,genauso wie szechuanosaurus.
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:iconkidenstormsoarer:
KidenStormsoarer Featured By Owner Feb 5, 2012
BITE HIS HEAD OFF! :p
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:iconthecomiccreator:
TheComicCreator Featured By Owner Feb 5, 2012
Utahraptor was the largest? Do you know how big Deltagromeus was?
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:iconteratophoneus:
Teratophoneus Featured By Owner Feb 5, 2012
Deltadromaeus isnt a dromaeosaurid. It belongs to the ceratosauria tribe. It was 8 metres long :)
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:iconthecomiccreator:
TheComicCreator Featured By Owner Feb 5, 2012
Whoops. Then I've been making a few mistakes ^^; Thank you for correcting me, though! :)
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:iconteratophoneus:
Teratophoneus Featured By Owner Feb 6, 2012
no problem :)
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:iconmikespikester11:
MikeSpikester11 Featured By Owner Feb 5, 2012
Always wonder how big Utahraptor was? I knew it was big, but wasn't sure. Looks like it could give a Black Rhinoceros a run for it's money.
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