There are actually several species of flying snake (Chrysopelea) including a red species, "pelis", which is also very attractive but rarely available on the market. I owned two of them and they remained a smaller species which ate lizards whereas the ornata (picture) will take rodents.
I once saw a show about the ornata and how they glide and they can glide 40 feet in any direction they wish for every 100 feet they jump from, and they can change the direction in which they wish to glide. Some guy built a high ramp and permitted them to jump and they filmed them and analyzed their movement as they glided. They actually "snake" their way in the direction they wish to go utilizing the force of air against their bellies as they fall. And they do not use this just to escape from animals chasing them. Where they live there are also gliding lizards and they use their gliding ability to chase their prey.
Dan