An eagle sitteth on Yggdrasil's limbs,
whose keen eyes widely ken;
'twixt his eyes a fallow falcon is perched,
called Vedhrfolnir, and watcheth.

Ratatosk the squirrel is called which runneth ay
about the ash Yggdrasil:
the warning words of the watchful eagle
he bears to Nidhogg beneath.

Four harts also the highest shoots,
ay gnaw from beneath:
Dain and Dvalin, Duneyr and Dyrathror.

More wyrms do lie the world-tree beneath
than unwise apes may ween:
Goin and Moin, which are Grafvitnir's sons,
Grabak and Grafvolluth;
Ofnir and Svafnir ay, I fear me,
on that tree's twigs will batten.

The ash Yggdrasil doth ill abide,
more than to men to is known:
the hart browsing above, its bole rotting,
and Nidhogg gnawing beneath.

Grimnismál