I know the lyrics to this. It appeared on the National Geographic album of Scot music that came out sometime in the '70's. I memorised it but I never found out the meaning of one of the verses.

Oh, but I mean to climb,
Up some higher tree
To harrie{sic} a white snowflake's nest.
Oh, and doon sall I fall
Aye without any fear
Tae the arms that love me the best.

It is the line about harrying the white snowflakes nest that I don't understand the meaning of.