
1) Fictional bird of prey 2) Legendary bird
Found on
https://www.crosswordclues.com/clue/avalerion

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 ha.....
Found on
http://en.wikipedia.org/wiki/Avalerion
No exact match found.