Here is a list of mythical creatures beginning with this letter and I am constantly gathering information from each continent and continually updating.
Amphiptere (Heraldic)
Amphiptere (also called Amphithere, Amphitere, or Phipthere; meaning bi-winged, two-winged) is a type of winged serpent found in European heraldry. Amphipteres generally were said to have light-colored feathers like a sunrise, a serpentine body similar to a lindworm, bat-like wings with feathers covering most of the forearm and often greenish in coloration, and a long tail much like a wyvern's tail.
Others are described as entirely covered in feathers with a spiked tail, bird-like wings, and a beak-like snout. Amphipteres saw infrequent use as heraldic devices. Amphipteres are present on the arms of the House of Potier, which depict a bendlet purpure between two amphipteres. The Potier heraldry also uses amphipteres as supporters, as do those of the Duke of Tresmes and Duke of Gesvres.