An illustration from a 17th-century Icelandic manuscript shows a hawk, Veðrfölnir, on top of an eagle on top of a tree, Yggdrasil.
Norse mythology, Veðrfölnir (
Old Norse "storm pale,"
 "wind bleached",
 or "wind-witherer"
) is a
hawk sitting between the eyes of an unnamed
eagle that is perched on top of the
Yggdrasil. Veðrfölnir is sometimes modernly
anglicized as Vedrfolnir, Vedfolnir or Vethrfolnir.
The unnamed eagle is attested in both the
Poetic Edda, compiled in the 13th century from earlier traditional sources, and the
Prose Edda, written in the 13th century by
Snorri Sturluson, while Veðrfölnir is solely attested in the
Prose Edda. In both the Poetic Edda and the Prose Edda, the squirrel
Ratatoskr carries messages between the unnamed eagle and
wyrm that resides below the world tree. Scholars have proposed theories about the implications of the birds.