Known as the Bayanshiree Formation, this area is a hotspot for dinosaur fossils, thanks to its arid conditions and layers of lithified mud, clay, and sand. It's turned up giant footprints, plane-sized pterosaurs, and the famous ' fighting dinosaurs '.

Paleontologists unearthed the fossil in Mongolia’s Gobi Desert, and the find is unique because of a sheath preserved on one of the digits, which reveals the claw’s true length.

While Duonychus tsogtbaatari had formidable claws, they were likely used to grasp vegetation, according to a study of a fully preserved fossil from the Gobi Desert.