You are in the forests of New Zealand, 40,000 years ago.

The mist hung heavy in the podocarp forest of southern Aotearoa, dampening the sound of your footsteps. You were looking for pounamu, but the forest was eerily quiet, the usual chatter of birds replaced by a profound silence. Suddenly, the silence was broken—not by a call, but by a sound like a heavy branch snapping.

You froze.

Through the dense ferns, perhaps twenty meters away, something moved. It was a shape that violated your understanding of a "bird."

It was a Dinornis, most likely a female. She stood nearly three meters tall, her head swaying high above the undergrowth, dwarfing the surrounding tree ferns. Her feathers were a mottled, earthy brown, dense and hair-like. She didn't look like a bird you knew—no wings, not even a stump, just a massive, smooth-necked body resting on legs thick as tree trunks. You saw the thick, blunt beak, designed for stripping twigs from trees that no other animal could reach.

She wasn’t afraid. Having never known a predator other than the sky-borne Haast’s eagle, she simply regarded you with a dark, intelligent eye, her head tilting slowly to face you...