Dinosaurs · Small theropod

Avimimus

Say it ah-vee-MEEM-us. The name means ‘bird mimic’.

Avimimus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of small theropods

Length: 1.5 m
Diet: Ate plants and animals
When: Late Cretaceous80 to 75 million years ago
Fossils found in: China, Mongolia
Named by: Kurzanov (1981)
Family tree: Dinosauria › Saurischia › Theropoda › Neotheropoda › Tetanurae › Avetheropoda › Coelurosauria › Tyrannoraptora › Maniraptoriformes › Maniraptora › Oviraptorosauria › Avimimidae

Where Avimimus 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

Alectrosaurus · same country
Anserimimus · same country
Archaeornithomimus · same country
Bactrosaurus · same country
Borogovia · same country
Citipati · same country
Goyocephale · same country
Khaan · same country

Other small theropods

Chirostenotes Late Cretaceous
Citipati Late Cretaceous
Conchoraptor Late Cretaceous
Khaan Late Cretaceous
Mononykus Late Cretaceous
Troodon Late Cretaceous
Stenonychosaurus Late Cretaceous
Bambiraptor Late Cretaceous

Source: Avimimus 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.