Dinosaur Cove Flight of the Winged Serpent:

Book Description
When Jamie moves to Dinosaur Cove with his father he’s looking forward to doing some fossil hunting on the beach. But when he and his friend, Tom, discover a forgotten cave with fossilised dinosaur footprints, it takes them to another world . . . a world of dinosaurs.

The boys return to the land of the dinosaurs and set off to explore around the beach and the lagoon. They spot a Quetzalcoatus, the biggest of the Pterosaurs, flying high above them and the boys decide to find its nest. Suddenly a baby Quetzalcoatus falls off the high cliff next to them, then another, then another! They’re not hurt, just learning to fly. Jamie and Tom’s dino friend, Wanna, goes to play with the babies, but when their mother swoops down to collect them, she takes Wanna away too!

How are the boys ever going to rescue their little friend? Will he be food for the Quetzalcoatus? Or will the mother decide to push him off the top of the cliff?