Velociraptor vs. Utahraptor

Common misconception: The JP raptors aren't Velociraptors. They're most likely Dienonychus.

the director knew of deinonycus but wanted velociraptor cause it sounded cooler.

possible because most viewrs know more of about velceraptors 

Velociraptors were actually alot smaller in real life.

They're Velociraptor. They're super inaccurate, all the dinosaurs are inaccurate on JP films, so...

halfway through producton of the movie is when utahraptor was discoverd

technically the Velociraptors in Jurassic Park are Dienonychus and not Velociraptors. The Dr. Grant was digging up its skeleton in Montana where Dienonychus fossils are found rather than Mongolia/China were velociraptor fossils are found.

Utahraptors were discovered later during filming yes but had the opposite problem of the velociraptor, they were too big. The dakotaraptor is more portionalized to the movie raptors than either Dienonychus and Utahraptor