Land of the Silver Birch

Time works in mysterious ways.  I remember some words from a song that I believe I was taught at primary school:

Land of the silver bird,
Home of the weasel,
Blue lakes and rocky shore,
I will return once more,
Ay-e-ay-e-ay-e-ay-e,
Ahhh, ah-ahhh

And thanks to the wonders of the internet, now I can find the actual song that this comes from:

The melody is how I remember, but the words that I remember are entirely different.  Were the lyrics taught to me incorrectly?  As a small child, did I learn them incorrectly?  Or have the ravages of time distorted the lyrics in my memory?  Who knows.