The verbal patterns of the original (crude stretches to make things rhyme).

Another one which is a bit harder to pin down is the spoof "Twa Corbies" I posted here, "The Corbie and the Crow", where they prefer to eat English corpses because they're fatter. It's attributed to Alexander Carlyle, and if that's the famous one, the minister of Inveresk, it predates Scott's version and is burlesquing whatever Scott used as source material - or did Scott do the burlesquing, making Carlyle's song into something much more serious? If it's by someone else and postdates Scott, it isn't a direct parody because its metre is quite different.