Deinonychus pesava cerca de 70 kg.
Name Means: "Terrible Claw" Length: 10 feet (3 m)
Pronounced: die-Non-ih-kiss Weight: 110 pounds (50 kilos)
When it lived: Early to Mid Cretaceous - 120 MYA
Where found: Montana, USA
Deinonychus (Raptor Prey Restraint)


Deinonychus was a spectacular dinosaur, but quite small. He was an agile hunter. His name means "terrible claw" and was named after the large retractable claws on his feet. He used these claws to cling to dinosaurs he hunted or climb trees. Deinonychus was slightly larger than Velociraptor. Teeth and several specimens of Deinonychus were found with the skeleton of a large herbivorous dinosaur, tenontosaurus,
In 2011, Denver Fowler and his collaborators suggested a new method by which Deinonic and other dromeosaurs may have captured and contained before. This model, known as the "raptor retention" (RPR) predation model, applies that Deinonic killed its shape very similarly to existing Accipitridae birds of prey: by jumping over its prey, trapping it under its body weight. and gripping it firmly with large sickle-shaped claws. Like accipitrids, or dromeosaurids, then they begin to feed on the animal while it is still alive, until it eventually dies from blood loss and organ failure. This proposal is based mainly on comparing morphology and proportions of "feet" and legs of dromeosaurs to various groups of prey with known predators. Fowler found that dromeosaurus "feet" and legs more closely resemble eagles and hawks, especially in terms of having a second extended claw and rapid range of claw movement. However, short metatarsus and foot strength were the most common for owls. The RPR predation method would be consistent with other aspects of Deinonic anatomy, such as its mandible and arm morphology. The arms have been covered with long feathers, and can be used as shaking stabilizers to maintain balance while standing on flailing animal prey, along with a firm counterweight tail. He thinks his jaws had a weak bite force, which could be used for saw-motion bites, like the modern komodo dragon which also had a weak bite force to end its prey.
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