Therizinosaurus eating.
Therizinosaurus was a huge segnosaurid theropod. Therizinosaurus was extremely unusual due to it being actually a theropod, living a herbivorous lifestyle and having a long sauropodmorph like neck. However, all segnosaurids (also known as therizinosaurids) had the same characteristics, making this animal not an odd one out. However, even though it was huge, it was more related to the more smaller Velociraptor and Oviraptor than T-rex therizinosaurus may have been 36-40 feet long and 20 feet tall and wieght 5 tons it lived in Asia and had 3 foot long dharp claws those claws may have been useful for fighting predators off and grabing plants.