Alerion is an eagle-like bird from medieval
bestiaries. They were said to be larger than an eagle, the color of fire, and the royalty of birds. There would only be two alerions at a time, and they would drown themselves after laying two eggs for the next generation. The chicks would then be cared for by other birds.
* [http://bestiary.ca/beasts/beast4798.htm Medieval Bestiary: Alerion]
Wikimedia Foundation. 2010.