Dromaeosaurus

***Dromaeosaurus*** was a genus of dromaeosaurid dinosaur which lived during the Upper Cretaceous period, about 75 million years ago. Its remains were found in the western United States and Alberta, Canada.

## Description

_Dromaeosaurus albertensis_ was a small carnivore, the size of a wolf, about 2 m (7 ft) in length and 15 kg (40 lb) in weight. Its mouth was full of sharp teeth, and it had a large "sickle claw" on each foot. It lived during the Upper Cretaceous: some teeth which may belong to it have been found from the latest Cretaceous, 65.5 million years ago.

Although only a few bones are known from the hind limb, they indicate that _Dromaeosaurus_ was a powerfully built animal. The presence of feathers in closely related animals makes it extremely likely that it was feathered as well.

_Dromaeosaurus_ had large eyes and excellent vision. It also probably had a good sense of smell and hearing. Its neck was curved and flexible and its jaws were solidly built. The tail was flexible at the base but sheathed in a lattice of bony rods; this allowed it to be carried in an upturned position.

## Discovery and later findings

Despite widespread attention in popular books about dinosaurs, and complete mounted skeleton casts in many museums, _Dromaeosaurus_ is surprisingly poorly known from actual fossils. The popular cast by the Tyrrell Museum was only made possible by knowledge gained from other dromaeosaurs discovered more recently.

The first known _Dromaeosaurus_ remains were discovered by paleontologist Barnum Brown during a 1914 expedition to Red Deer River on behalf of the American Museum of Natural History.

Several species of _Dromaeosaurus_ have been described, but _Dromaeosaurus albertensis_ is the most complete specimen. The genus is even rarer than other small theropods, although it was one of the first small theropods described.

Matthew and Brown originally placed _Dromaeosaurus_ within "Deinodontidae" (now known as Tyrannosauridae), based on some similarities in the general proportions of the skull. In 1969, John Ostrom recognized that _Dromaeosaurus_ shared many features with _Velociraptor_ and the newly-discovered _Deinonychus_, and assigned these forms to a new family: Dromaeosauridae.

## Palaeobiology and diet

_Dromaeosaurus_ differs from most of its relatives in having a short, massive skull, a deep mandible, and robust teeth. The teeth tend to be more heavily-worn than those of its relative _Saurornitholestes_, suggesting that its jaws were used for crushing and tearing rather than simply slicing through flesh. _Dromaeosaurus_ had a bite nearly three times as powerful as that of a _Velociraptor_.

It is possible that, unlike most other dromaeosaurs, _Dromaeosaurus_ relied more on its jaws than its claws to dispatch its prey. It was probably better suited to tackling large prey than the more lightly-built _Saurornitholestes_.

## Relationships

The relationships of _Dromaeosaurus_ are unclear. Although its rugged build gives it a primitive appearance, it was actually a very specialized animal. It is usually given its own subfamily, the Dromaeosaurinae; this group is thought to include _Utahraptor_, _Achillobator_, _Adasaurus_, and possibly _Deinonychus_. However, the relationships of dromaeosaurs are still in a state of flux.

## In popular culture

_Dromaeosaurus_ are featured in _Walking with Dinosaurs_, stalking juvenile _Torosaurus_ and attempting to steal eggs from _Tyrannosaurus_, despite never coexisting with the latter in real life.
_Dromaeosaurus_ makes an appearance in _Jurassic Fight Club_, where a pack is shown being capable of taking down _Edmontosaurus_ in spite of the carnivores' small size, but the carcass is later taken by a _Tyrannosaurus_ (despite the tyrannosaur not being contemporaneous with _Dromaeosaurus_).
_ Dromaeosaurus _ was also often seen throughout the show, _Dino Dan_, which was about a boy who could see dinosaurs in the modern day world.