Dinosaurs · Small theropod

Unenlagia

Say it oon-en-lahg-ee-ah. The name means ‘half bird’.

Unenlagia 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: 2.4 m
Diet: Meat-eater
When: Late Cretaceous94 to 86 million years ago
Fossils found in: Argentina
Named by: Novas and Puerta (1997)
Family tree: Dinosauria › Saurischia › Theropoda › Dromaeosauridae

Where Unenlagia 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

Buitreraptor · same country
Alvarezsaurus · same country
Argentinosaurus · same country
Gasparinisaura · same country
Mapusaurus · same country
Achillobator
Aralosaurus
Archaeornithomimus

Other small theropods

Archaeornithomimus Late Cretaceous
Urbacodon Late Cretaceous
Alvarezsaurus Late Cretaceous
Buitreraptor Late Cretaceous
Erlikosaurus Late Cretaceous
Oviraptor Late Cretaceous
Saurornithoides Late Cretaceous
Bambiraptor Late Cretaceous

Source: Unenlagia 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.