Struthiomimus

Name meaning:

Ostrich mimic

Period of life:

77-66 mya

Period:

Cretaceous period

Habitat:

Floodplains

Taxonomy:

Theropods

Countries:

Cretaceous period Struthiomimus | 3D Dinopedia

Albertonectes

Citipati

Struthiomimus ()

Struthiomimus was one of the most bird-like dinosaurs of the Cretaceous period. Its name translates as «ostrich mimic», and indeed, in appearance it resembled a giant prehistoric bird: a lightweight body, long legs, and an elongated neck made it an ideal runner.

The first incomplete fossils of Struthiomimus were discovered in 1901 in what is now Dinosaur Provincial Park in Canada. Later, in 1914, a staff member of the American Museum of Natural History uncovered a nearly complete skeleton in Alberta, allowing scientists to study this unusual dinosaur in detail.

The type species, Struthiomimus altus, reached about 4.3 meters in length and weighed between 150 and 250 kilograms. Paleontologists later identified a larger species, Struthiomimus sedens, measuring up to 4.8 meters long and weighing around 400 kilograms.

Struthiomimus had a small head with large eyes set on a long, flexible neck. It lacked teeth; instead, it possessed a beak similar to that of birds. Scientists suggest that its body was covered in feathers, making its resemblance to an ostrich even more striking. Its forelimbs, with three long fingers, somewhat resembled the claws of a sloth, while its stiff tail acted as a counterbalance during rapid running.

Struthiomimus was omnivorous. Its diet was highly varied: seeds, fruits, leaves, insects, and possibly small animals. Because it had no teeth, it likely swallowed small stones—gastroliths—much like modern birds, which helped grind food in the stomach.

This dinosaur was a true «marathon runner» of its time. Thanks to its lightweight build and long legs, it could achieve high speeds, escaping predators and traveling across the vast landscapes of the Late Cretaceous. Agile, swift, and adaptable, Struthiomimus stands as one of the best examples of how dinosaurs gradually approached the avian condition.

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