Dinosaurs · Small theropod

Harpymimus

Say it har-pi-miem-us. The name means ‘harpy mimic’.

Harpymimus 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: 2 m
Diet: Ate plants and animals
When: Early Cretaceous121 to 99 million years ago
Fossils found in: Mongolia
Named by: Barsbold and Perle (1984)
Family tree: Dinosauria › Saurischia › Theropoda › Ornithomimosauria

Where Harpymimus 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

Shamosaurus · same country
Psittacosaurus · same country
Achillobator · same country
Erlikosaurus · same country
Garudimimus · same country
Graciliceratops · same country
Talarurus · same country
Tsagantegia · same country

Other small theropods

Microraptor Early Cretaceous
Protarchaeopteryx Early Cretaceous
Sinornithosaurus Early Cretaceous
Caudipteryx Early Cretaceous
Sinocalliopteryx Early Cretaceous
Sinosauropteryx Early Cretaceous
Shanag Early Cretaceous
Beipiaosaurus Early Cretaceous

Source: Harpymimus 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.