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Velociraptor, like other dromaeosaurids, had a large manus with three elongated digits (fingers), which ended up in strongly curved unguals (claw bones) that were similar in construction and flexibility to the wing bones of modern birds. The second digit was the longest of the three digits present, while the first was shortest.
They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed. Such sites may have separate entries if they are considered to be more notable than the formation as a whole. In contrast, extensive formations associated with large areas may be equivalently represented at many locations.
They are known to attack both dogs and people. The cassowary has often been labelled "the world's most dangerous bird", [7] [8] although in terms of recorded statistics, it pales in comparison to the common ostrich, which kills two to three humans per year in South Africa. [9]
During the Late Pleistocene, particularly from around 50,000 years ago onwards, most large mammal species became extinct, including 80% of all mammals greater than 1,000 kilograms (2,200 lb), while small animals were largely unaffected. This pronouncedly size-biased extinction is otherwise unprecedented in the geological record.
Crocodilians living in this ecosystem included Leidyosuchus, around 12 feet (3.5 meters) long, and the smaller Albertochampsa. The semiaquatic superficially croc-like Champsosaurus also was present.
Deinonychus were featured prominently in Harry Adam Knight's novel Carnosaur and its film adaption, and Michael Crichton's novels Jurassic Park and The Lost World and their film adaptations, directed by Steven Spielberg. Crichton ultimately chose to use the name Velociraptor for these dinosaurs, rather than Deinonychus.
A size comparison diagram between a real-life Velociraptor (green) and a Velociraptor from Jurassic Park (orange) alongside a human (blue). Real Velociraptors measured approximately 2 feet (0.61 m) in height and 6 feet (1.8 m) in length. [9]
Utahraptor (meaning "Utah's predator") is a genus of large dromaeosaurid (a group of feathered carnivorous theropods) dinosaur that lived during the Early Cretaceous period from around 135 to 130 million years ago in what is now the United States.