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Dinosaur and Paleontology Dictionary |
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Dromaeosaurids or Dromaeosauridae (meaning "swift lizards") are a subgroup of the group Coelurosauria and of the theropods. These dinosaurs were intelligent, small, large-eyed, fast, bipedal, efficient killers that were closely related to birds.
These killer dinosaurs had large, sickle-shaped claws on the middle toe of each foot, capable of slashing prey. They may have hunted in packs, killing even large sauropods. They were the most intelligent group of dinosaurs.
Dromaeosaurid fossils have been found in North America, South America, and Asia. Dromaeosaurs lived from the early to late Cretaceous period. Adasaurus, Dromaeosaurus, Deinonychus, Utahraptor, Elopteryx, Saurornitholestes, and Velociraptor are examples of dromaeosaurids.
A recent Chinese fossil revealed what is perhaps downy feathers on a new dromaeosaurid, Sinornithosaurus.
| Dromaeosaur | When it Lived (Millions of Years Ago) | Size |
|---|---|---|
| Achillobator | 86-71 mya | 16 ft (5 m) |
| Utahraptor | 125 mya | 20 ft (6.5 m) |
| Sinornithosaurus | 124 mya | 6 ft (1.8 m) |
| Deinonychus | 119-93 mya | 10 ft (3 m) |
| Velociraptor | 85-80 mya | 6 ft (1.8 m) |
| Adasaurus | 80-73 mya | 6 ft (1.8 m) |
| Dromaeosaurus | 76-72 mya | 6 ft (1.8 m) |
| Saurornitholestes | 76-73 mya | 6 ft (1.8 m) |
The following are Dromaeosaurids:
Click on a dinosaur for an information sheet about the dinosaur. Pictures are not to scale.
| Dromaeosaurids (very dangerous, smart dinosaurs - the "raptors") |
ADASAURUS 80-73 million years ago |
 DEINONYCHUS 110-100 million years ago |
DROMAEOSAURUS 76-72 million years ago |
ELOPTERYX 76-72 million years ago |
SAURORNITHOLESTES 76-73 million years ago |
SINORNITHOSAURUS 124 million years ago |
UTAHRAPTOR 125 million years ago |
 VELOCIRAPTOR 85-80 million years ago |
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