Amphiptere

Amphiptere (also called Amphithere, Amphitere, or Phipthere; meaning bi-winged, two-winged) is a type of winged serpent found in European heraldry.

[1] 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.

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Amphiptere by Edward Topsell (1608)
A heraldic amphiptere