The Utahraptor could grow up to 7 meters (20 feet) long and weigh almost a ton. A close relative of the Velociraptor, this dinosaur was a fierce predator. Like other dromaeosaurids, it had a huge, blade-like claw on its second toe. With this 20 centimeter talon, it is believed that the Utahraptor could make a deep cut 5 to 6 feet long with one swipe, enabling it to kill dinosaurs much larger than itself.

sounds pretty fearsome... just don't know if 8 or 10 of them could take a spinosaurus... if spino gets hold of them they wouldnt last long... hundreds of the switchblade carrying velociraptors though?....

you are correct, you didn't see the Utah Raptor on the list because it isn't there.
and hence why I put about the same size in the movie versus real life since I didn't have the dimensions in front of me.

The only things that can actually mammals that can actually defeat a full grown Nile (2 largest croc) is the elephant and maybe Hippo...It boes boh ways [for hippo].

The Saltwater croc have no predators...It is very unlikely they will meet a full grown shark, but they have been found with baby sharks in their stomach...

I agree, but that is not the point. The point is if a critter can fend off an attack from the croc. Much like the times when a water buffalo succeds in kicking a lion's behind and surviving the attack. Sometimes the lion does not survive the encounter. Even T-Rex had its losses.

Thing is, the Saltwater croc can fend off its enemies...the only match for it is facing a Great White out in the open ocean...

Deinonychus was the hardest, just like a large Velociraptor and more intelligent too.

In fact the raptors in Jurassic park look more like Deinonychus than the raptors they are meant to be.

this was probably a trick question... the Deinonychus is in the poll, and is in the Dromaeosauridae family that includes 'Raptors'. and I didn't do enough research...

Deinonychus at 175 lbs... hmm... approximately 103 Deinonychus against 1 Spinosaurus... I'd like to see that!!! it would be a tremendous fight...

The raptors would win....

Pack predators would have a distinct advantage over a predator that normally hunted solo. It would be interesting to see, but the pack mentality would probably cause them to not attack for fear of losing valuable members of the team.

Since the pack hunting predators rely on the pack, even the loss of one of it's members could spell disaster for future hunts.

^Sounds very reminiscent of early human social structures doesn't it?

for the sake of argument, lets say the Spino stumbled across a LARGE Deinonychus nesting ground... with all the Mums & Dads at home... let's say about 103... it would be an awesome spectacle...

Oh no doubt about it, sheer numbers would definatly be in the Deinonychus favor. Either the Spinosaurs would run off (for self preservation) or the Deinonychus at that high of numbers would annhilate him so it would be a very short fight.

How come so many people are voting for veloceraptor? They're like deinonychus's baby siblings. I voted deinonychus. Wouldn't want to run into a pack of them.

I voted Tarbosuarus

I'd run a mile from Tarby

(sad british comedian)

The baddest ones was the velociraptor and the allosaurus, the t-rex was maybe one of the biggest, but if it ever met an other dinosaur at the same size it would run like a mouse would run from a cat !

The t-rex is not the biggest carnivore, it was dwarfed by Spinosaurus, Giginatosaurus, Carcharodontosaurus, and Saurophaganax.
How would you know that it would run???

I didn`t say it was the biggest eighter ! I said it was one of the biggest ! And about the dinosaurs you said scientists belive that out off what they knew about how the t-rex lived theyve found out that it was scared off these dinosaurs you said and also often runed away when it saw an other t-rex (exept when it protected an egg off course)

That's BS (pardon me) That is a lie...Scientist could never infer if a dinosaur would run away from another...

Ohhh...