Leadfingers, the song that your Scots mate used to sing was probably this:

THREE CRAWS

Three craws
sat upon a wa'
sat upon a wa'
sat upon a wa-a-a-a'
Three craws
sat upon a wa'
On a cauld an frosty mornin


The first craw
wis greetin fur his maw
wis greetin fur his maw
wis greetin fur his ma-a-a-aw
Three craws
sat upon a wa'
On a cauld an frosty mornin

The second craw
Fell an broke his jaw
etc

The third craw
Couldny flee at a' (or: awa')
etc

The fourth craw
Wisny there at a'
etc


Cheers


Steven