Pterosaurs are a group of flying reptiles simular to the dinosaurs. Sepatated in to two groups, the small, long tailed Rhaphorhynchoidea, and the larger, shorter tailed Pterosauria. Some are thought have survived today. Wyverns are thought to have been real Medeval sightings of Pterosaurs. Mondern sightings include Kongamato, Ropen, the Minnesota Pterosaur, the Thunder Bird, and a photo known as the Civil War Pterosaur, the real photo known as the Sepia Shot and the fake as the Yellow Shot.