Amphipteres generally were said to have greenish-yellow feathers, a serpentine body similar to a lindworm, bat-like green wings with feathered bone, and an arrow-tipped tail much like a wyvern's. Others are described as entirely covered in feathers with a spiked tail, bird-like wings, and a beak-like snout. Even more uncommon is the description of one with legs.
In Popular Culture
Amphitheres feature in the Dragonology series of books and Dracopedia: A Guide to Drawing the Dragons of the World. The former is presented as if it were 19th century research into real dragons. In such media, they are also depicted as being able to constrict their prey.