Dinosaur Deinonychus is a spectacular, but fairly small dinosaur. It measured about five to seven feet tall, and about twelve feet long. Its weight is estimated at 150-200 pounds. Bones of several individuals of Deinonychus have been found with the skeleton of a large plant-eating dinosaur, called Tenontosaurus. This has been historically interpreted as evidence of pack hunting, though most experts nowadays think it was a scavenger congregation. At any rate, modern pack hunting animals can't bring down prey that is too large, and Tenontosaurus was roughly as big as a rhinoceros, compared to the dog-sized Deinonychus.
Deinonychus belongs to a family of dinosaurs called dromaeosaurs. They all share the same characteristics; a lightly built skull with sharp backwardly curved teeth, elongated arms and hands with sharp claws, and an extraordinary sickle-like second toe claw which was carried raised off the ground to protect the sharp point. Dromaeosaurs probably had keen vision and their brains were relatively large for a dinosaur. The dromaeosaurs lived throughout the Cretaceous period, 140 to 66.038 million years ago.
Deinonychus was highly specialized for swift movement and savage attack. With its terrible claw flicked forward it slashed its prey with one foot while standing on the other. This kind of behavior required good coordination, excellent eyesight and a high level of energy. All these Dinosaur Deinonychus pictures were collected from the internet.