Dinosaurs · Large ornithopod

Bactrosaurus

Say it bak-troh-sore-us. The name means ‘club [spined] lizard’.

Bactrosaurus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of large ornithopods

Length: 6 m
Diet: Plant-eater
When: Late Cretaceous84 to 71 million years ago
Fossils found in: China
Named by: Gilmore (1933)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Hadrosauridae

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

Large ornithopods. Big plant-eaters that walked on two or four legs, including the duck-billed dinosaurs. See all 36

Lived at the same time

Alectrosaurus · same country
Archaeornithomimus · same country
Microceratus · same country
Micropachycephalosaurus · same country
Nanshiungosaurus · same country
Sonidosaurus · same country
Tanius · same country
Tsintaosaurus · same country

Other large ornithopods

Lophorhothon Late Cretaceous
Telmatosaurus Late Cretaceous
Tsintaosaurus Late Cretaceous
Gryposaurus Late Cretaceous
Maiasaura Late Cretaceous
Brachylophosaurus Late Cretaceous
Nipponosaurus Late Cretaceous
Tanius Late Cretaceous

Source: Bactrosaurus 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.