Malcolm,

No doubt you are correct in much you state. Haggi is a local coloquielism and can't be considered the difinitve etymology. I would posit that there is an Arboreal variety just as there are desert shrews there are woodland shrews. The local wiley Haggis is the prefred meal of mainy the ridge runner who can't out gun the Possum or the Whistle pig. Cooked over a fire of hickory and served on a bed of steamed nettles and Wooley Dock. Chased with a glass of Old Stump Blower and nothing is the same ever again. Victuals at their finest.

Don