Oviraptor probably would have run from predators. If it was desperate, it could have attacked by biting them with its beak or attacking with its claws.
Oviraptor, by scientific guess, lived around 3 years, maybe 5 if there are few predators. Oviraptor could well defend itself, though. It is probable they could live longer, but we may never know, due to the fact that Oviraptor is extinct.
The Oviraptors only real crime was stealing the eggs of the other, and larger dinosaurs that lived nearby or close to where the oviraptor itself lived.
The Dimetrodon would use its sail to hide from its predators
An oviraptor
Oviraptors did, but scientists found a fossil of one sitting on a clutch of eggs which looked like the eggs from Protoceratops . They were actually Oviraptor eggs. The scientists thought that Oviraptor died when it found the eggs
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on earth
how do young protect itself
Tyrannosaurs like Tarbosaurus and Alioramus, and dromaeosaurs like Velociraptor could have been natural predators of Oviraptor.
how does 'what' protect itself.
The dinosaur name oviraptor originally meant "egg thief", because of the fact that an oviraptor skeleton was discovered "stealing" eggs from another dinosaur's nest. But recent evidence actually shows that the oviraptor was just being a good mother and protecting her nest from egg thiefs, but most likely a sand storm.
A blackbrid can protect itself from danger by