What is "avalerion"

An avalerion or alerion is a mythological bird. It was "rather small, yet larger than an eagle" and lived near the Hydaspes and the Indus according to European medieval geographers and bestiaries, which were possibly based on a description by Pliny. Only two of the birds were said to exist at a time. A pair of eggs was laid every 60 years; after hatching, the parents drowned themselves.

Some coats of arms include alerions. In heraldry, an alerion is most often depicted as a bird with no beak and feathered stumps in place of legs, or no legs at all. Notably, the features three alerions, because alerion is a partial anagram of Lorraine.

The word's ultimate origin is unclear, possibly adapted from the German (‘eagle’) or (‘noble eagle’). And it is found in 12th-century French as and in medieval Latin as (a large eagle-like bird).