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Quetzalcoatlus lived at the very end of the Cretaceous, around 67 to 66 million years ago. Its fossils come from Big Bend National Park in Texas.
Drawn at the same 6 ft 6.5 in: Ostrich. Same drawing, different listings: a quetzalcoatlus’ figure is the lower end of its range, an ostrich’s a minimum.
This is a published species or breed reference, not a prediction for an individual animal. Where a range is supplied, both ends appear with the reading. Shoulder height and head height are kept apart when comparing animals.