Quetzalcoatlus lived in North America roughly 68 to 66 million years ago, at the very end of the Cretaceous. It wasn't a dinosaur — it was a pterosaur, a separate group of flying reptiles that lived alongside dinosaurs but branched off from a different reptile lineage.
A wingspan like a small plane
The largest known species had an estimated wingspan of roughly 10 to 11 meters (33–36 ft) — comparable to a small aircraft, and among the largest wingspans of any flying animal known to science, living or extinct. Despite that size, Quetzalcoatlus is thought to have weighed only around 200 to 250 kg (440–550 lb), thanks to lightweight, hollow bones similar in principle to a bird's.
Tall enough to look a giraffe in the eye
On the ground, giant azhdarchid pterosaurs like Quetzalcoatlus are thought to have stood roughly as tall as a giraffe when their long necks were held upright — walking on all fours using their wings as front limbs, similar to how modern bats move on the ground.
What it likely ate
Rather than the sea-skimming fish-eater once imagined for many pterosaurs, most researchers now think Quetzalcoatlus was a terrestrial forager — stalking small animals on land somewhat like an oversized, flying stork.