Finally, after much feeding, the baby has grown into a full Dino! Dinos can eat almost anything, including things with spikes. In order to do so, they must have very tough stomachs. Yellow Dinos have very long necks, which they use to reach and eat food located high off the ground.

The Birthday Dinos arrived as eggs in Lagie's caves after Lagie made a special trip on her birthday to the local marketplace. The plan was to bring some cheer to the caves during that time worldwide when all the humans in all the caves had to spend a protracted amount of time at home alone in order to prevent the spread of a highly infectious virus. Well, things didn't quite go as planned. The eggs hatched together. The hatchlings grew up together... and the adult dinos stayed together, sharing an oversized cave off the beaten path where they wouldn't be bothered by too many people or dragons.

Diplodocus, with his long neck, and his ability to be very quiet on his oversized feet, is the group's sentry. He keeps an eye on the cave entrance and lets Pterodactylus know when it's time to start his flapping. He's rather jealous of Pterodactylus's wings, in fact, and spends his off hours designing elaborate inventions that might enable a diplodocus to fly.