Deinonychus and the other Dromaeosaurs were small and aggressive hunters. Very few theropods could match their intelligens, and none could show such a cruel combination of weapons. The jaws of the Dromaeosaurs were filled with large, rounded daggerlike teeth, the threefingered hands had curved claws, and even larger curved claws shot out from their birdlike feet. The large springknife klaws on the middle toe were twice as long as the other two. Dromaesaurus varied in length between 2-6 meters, and they developed probably during Jura, tho the known fosils is from Kritt.
Noone knows for sure what color the Deinonychus had. Most likely they would have been toned or colored so that their skin would melt with the surroundings. Tigerstriped or spotted like a Cheeta, perhaps. This type of camuflage would help the predator to hunt.
Placed as if it is jumping to kill, this skeleton of Deunonychus shows some of the main details of the fysical look of this predator that made them famous and feared. The jaws are open to show the terrible, cruel teeth, the tiny forelimbs folds out like birdwings, and stretches out to attatch the large claws to the prey. The springknife claws on the hindlegs is prepeared to cut the prey's softer underside. The tail is stiffed with plates of bone, to make it a help to balance during jumps and running, helping the predator to move around.