Dinosaurs · Small theropod

Troodon

Say it TROH-oh-don. The name means ‘wounding tooth’.

No length given in the museum's record.

The museum gives no length for this dinosaur, so we cannot draw it to scale.Body shape drawn for this site, showing the general build of small theropods

Diet: Ate plants and animals
Walked: On 2 legs
When: Late Cretaceous79 to 75 million years ago
Fossils found in: USA
Named by: Leidy (1856)
Family tree: Dinosauria › Saurischia › Theropoda › Troodontidae

Where Troodon sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Small theropods. Small two-legged dinosaurs, many feathered, the group that includes birds. See all 60

Lived at the same time

Achelousaurus · same country
Albertaceratops · same country
Avaceratops · same country
Bambiraptor · same country
Dryptosaurus · same country
Gorgosaurus · same country
Gryposaurus · same country
Lophorhothon · same country

Other small theropods

Chirostenotes Late Cretaceous
Avimimus Late Cretaceous
Citipati Late Cretaceous
Conchoraptor Late Cretaceous
Khaan Late Cretaceous
Mononykus Late Cretaceous
Stenonychosaurus Late Cretaceous
Dromaeosaurus Late Cretaceous

Source: Troodon in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.