Struthiomimus

Struthiomimus Temporal range: Late Cretaceous, 77–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Cast of an S. altus skeleton, Rocky Mountain Dinosaur Resource Center
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	†Ornithomimosauria
Family:	†Ornithomimidae
Genus:	†Struthiomimus Osborn, 1917
Species:	†S. altus
Binomial name
†Struthiomimus altus (Lambe, 1902)

Struthiomimus, meaning "ostrich-mimic" (from the Greek στρούθειος/stroutheios, or "of the ostrich", and μῖμος/mimos, meaning "mimic" or "imitator"), is a genus of ornithomimid dinosaurs from the late Cretaceous of North America. Ornithomimids were long-legged, bipedal, ostrich-like dinosaurs with toothless beaks. The type species, Struthiomimus altus, is one of the more common, smaller dinosaurs found in Dinosaur Provincial Park; their overall abundance—in addition to their toothless beak—suggests that these animals were mainly herbivorous or (more likely) omnivorous, rather than purely carnivorous. Similar to the modern extant ostriches, emus, and rheas (among other birds), ornithomimid dinosaurs likely lived as opportunistic omnivores, supplementing a largely plant-based diet with a variety of small mammals, reptiles, amphibians, insects, invertebrates, and anything else they could fit into their mouth, as they foraged.^[1]