about 2 years
The heaviest flying bird of all time dominated the skies of Patagonia with iron wings. It strode overland while on the hunt, swallowing its prey in one mouthful. It was certainly pushing the limit of heavy, feathered flying creatures but was still able to patrol immense distances of grassland bordered by the young Andes. How did a bird with such a huge wingspan even manage to get off the ground?