The remains of Therizinosaurus were found in the well-known Nemegt Formation in the Gobi Desert, dating back to the Maastrichtian stage about 70 million and 68 million years ago.
Over the time therizinosaurs have been suggested to have been slow, high browser theropods supported by the morphology of their dentition and broad torsos.
The environments that Therizinosaurus inhabited consisted of large meandering and braided rivers with highly wooden terrains that supported diverse herbivorous dinosaurs like Therizinosaurus.
Large, enclosed, canopy-like forests composed by Araucarias have been determined by the δ13C level preserved on the tooth enamel of many herbivorous dinosaurs and the numerous petrified wood across the formation.
In addition, the presence of oasis-like formations are also reported.
These structures may have served as areas of interest for the smaller oviraptorosaurs.

The dinosaur fauna of the Nemegt Formation was very diverse.
Therizinosaurus shared its habitat with other theropods such as the deinonychosaurs Adasaurus and Zanabazar; ornithomimosaurs Anserimimus, Deinocheirus and Gallimimus; oviraptorosaurs Nemegtomaia, Elmisaurus, Gobiraptor, and the apex predators of the formation, Tarbosaurus.
Other herbivorous dinosaurs include Barsboldia, Tarchia, Prenocephale, Nemegtosaurus, Opisthocoelicaudia and the most common herbivores, Saurolophus.
Senter and James have suggested that Therizinosaurus were among the tallest dinosaurs in the Nemegt Formation.
Due to their prominent heights and high browsing life-styles, these animals probably had no competition with other herbivores over the foliage.
However, they also suggested a potential niche partitioning with the sauropods of the formation.
If engaged in combat, a large individual of the predatory Tarbosaurus may have been not able to bite any higher than the thighs or belly of an adult standing Therizinosaurus.
The gigantic claws likely functioned as optimal defense against this situation.
The remains of Therizinosaurus were found in the well-known Nemegt Formation in the Gobi Desert, dating back to the Maastrichtian stage about 70 million and 68 million years ago. Over the time therizinosaurs have been suggested to have been slow, high browser theropods supported by the morphology of their dentition and broad torsos. The environments that Therizinosaurus inhabited consisted of large meandering and braided rivers with highly wooden terrains that supported diverse herbivorous dinosaurs like Therizinosaurus. Large, enclosed, canopy-like forests composed by Araucarias have been determined by the δ13C level preserved on the tooth enamel of many herbivorous dinosaurs and the numerous petrified wood across the formation. In addition, the presence of oasis-like formations are also reported. These structures may have served as areas of interest for the smaller oviraptorosaurs.
The dinosaur fauna of the Nemegt Formation was very diverse. Therizinosaurus shared its habitat with other theropods such as the deinonychosaurs Adasaurus and Zanabazar; ornithomimosaurs Anserimimus, Deinocheirus and Gallimimus; oviraptorosaurs Nemegtomaia, Elmisaurus, Gobiraptor, and the apex predators of the formation, Tarbosaurus. Other herbivorous dinosaurs include Barsboldia, Tarchia, Prenocephale, Nemegtosaurus, Opisthocoelicaudia and the most common herbivores, Saurolophus. Senter and James have suggested that Therizinosaurus were among the tallest dinosaurs in the Nemegt Formation. Due to their prominent heights and high browsing life-styles, these animals probably had no competition with other herbivores over the foliage. However, they also suggested a potential niche partitioning with the sauropods of the formation. If engaged in combat, a large individual of the predatory Tarbosaurus may have been not able to bite any higher than the thighs or belly of an adult standing Therizinosaurus. The gigantic claws likely functioned as optimal defense against this situation.
Therizinosaurus