Oviparous animals are those that reproduce by laying eggs. These eggs contain the developing embryos, which receive nourishment from the yolk inside. Common examples of oviparous animals include birds, reptiles, and fish. The eggs are often laid in a safe environment to protect them from predators and environmental hazards. The process of laying eggs can vary widely among oviparous species. For instance, turtles bury their eggs in sand, while birds build nests to keep their eggs safe. After a certain incubation period, the eggs hatch, and the young animals emerge, ready to begin their lives.