In the fourth of the six-part series, a flock of the extinct birds arrives in the present day.

It’s known today as a city for fossils, and some of its most celebrated inhabitants are extinct birds.

Unlike many large extinct birds, such as dodos, the giant turkeys were not flightless.

It features dozens of tracks and trackways made by extinct birds, dinosaurs, spiders, camels, elephants, and lizard-like reptiles.

In such a classification, all 12,000 known species of extant and extinct birds would then have to be incorporated into this genus.