Thanks, this is pretty cool! Though it contained no huge surprises f or me, except maybe more Wilsons in New Zealand & Australia than the UK (now, why was I surprised at that?)
NEW ZEALAND 5653.28
AUSTRALIA 5037.98
UNITED KINGDOM 4321.21
UNITED STATES 2985.92
CANADA 965.02

I looked at the density of Wilsons in the parts of Scotland I've been seeing dead relatives in (Dunbartonshire, Stirlingshire, Lanarkshire) but they're not actually the densest concentrations. More like Dumfries & Ayshire.
-Mark