Pterosaurs were a group of flying reptiles that lived alongside dinosaurs, spanning from the Triassic to the Cretaceous periods (about 225 to 66 million years ago). They had a wide range of sizes, from the small Anurognathus, with a wingspan of just 1 meter, to the enormous Quetzalcoatlus, which had a wingspan of 10-12 meters. Unlike modern birds, pterosaurs had membranous wings, supported by an elongated fourth finger, giving them unique flight capabilities. They were not dinosaurs but shared t