Walking with Dinosaurs

So the herd is setting out on an epic 400-mile trek north where by summer the vegetation should be abundant.

[Low growl] [Snorting huff] It will be a grueling journey, especially if you're one of the youngest... like Albie.

At less than a year old, he's only half a meter tall... which makes keeping up... a bit of a challenge.

[Albie squeaks] Even so, he must stay close to his mother... [Albie whines] [Soft bellowing] because the herd aren't the only ones that are hungry.

Following in their wake, Azhdarchid pterosaur.

With a 6 meter wingspan and estimated speed of 60 miles an hour... [Deep rumbling call] a young Pachyrhinosaurus makes for an easy target.

[Low growl] [Ferocious growling] [Whimpers] [Growls] A close call.

But it's only the start of the challenges they will face as the search for food takes them across the prehistoric wilderness.