Scientists: The Quetzalcoatlus Pterosaur Could Probably Fly for 7-10 Days at a Time...
The Quetzalcoatlus, a dinosaur with a wingspan of 35 feet, is thought to be the largest flying animal in Earth history. Some paleontologists think that it was so big that it wouldn't have been able to get off the ground...
https://www.neatorama.com/2010/11/25/scientists-the-quetzalcoatlus-pterosaur-could-probably-fly-for-7-10-days-at-a-time/
