Create a highly detailed and realistic depiction of a Therizinosaurus, a dinosaur known for its massive claws and herbivorous diet, living during the Late Cretaceous period. The Therizinosaurus should have a bird-like appearance, with long, curved claws on its forelimbs, a beak-like mouth, and a body covered in feathers. The environment should reflect a lush, prehistoric forest with dense vegetation, towering conifer trees, and ferns. Include other elements typical of the era, such as a distant Mehr sehen