What was the oviraptors natural habitat?

Oviraptors (name meaning egg thief) are native to Mongolia. They are commonly found in the Gobi Desert, and according to the evidence they likely lived in a dry sandy environment. They lived along the velociraptor (quick thief, as discovered by Roy Chapman Andrews himself. There was likely competition between the oviraptors and velociraptors for resources, and both probably preyed on a species of pachycephalosauridae. Also living at the time was a therapod very similar to tyrannosaurus rex. It was known as the tarbosaurus.