Reciting some various info from
www.planeshift.it"Object to buy: Healthy, trained Pterosaur - 45,000 Tria"
" The Elite Way of Travelling - The fastest way of getting over remarkable distances in a short time is using flying animals: Pterosaurs and Megaras."
"The Pterosaurs are reptiles with organs adapted to flight, such as their membranous wings and long tails, which they use as a rudder. The Pterosaurs' dimensions vary from three to six meters, not including their tails, and their wingspan is directly proportionate to their bodies. From the moment they are born, Pterosaurs begin training to carry a person sitting in a saddle buckled between the animal's shoulder blades. Pterosaurs must be at least three years old and fully trained before they can actually carry a person, which makes them precious, coveted, and very expensive to keep. Only extremely wealthy people can afford these lizards, but no matter how wealthy a family is they may only legally own a single Pterosaur. The law forbids owning more than one of these animals in order to avoid dangerously crowding the limited air space.
The second flying animal is the Megaras, which is similar to a giant bat. Scientists believe the Crystal has genetically mutated the Megaras, since they reproduce only in Yliakum. These bat-like creatures are not as docile as the Pterosaurs, but they are stronger and more efficient, making them perfect to carry heavy but not too delicate loads, such as food and building materials. As with the Pterosaurs, each mercantile society is allowed to own only one Megaras."
Hope that clears it up