https://www.npr.org/2010/11/16/131362653/peerless-pterosaur-could-fly-long-distance-for-days#:~:text=The%20results%2C%20which%20they%20presented,between%208%2C0

https://www.npr.org/2010/11/16/131362653/peerless-pterosaur-could-fly-long-distance-for-days#:~:text=The%20results%2C%20which%20they%20presented,between%208%2C000%20and%2012%2C000%20miles https://www.npr.org/2010/11/16/131362653/peerless-pterosaur-... Seems to be a good chunk of (educated) conjecture.