Update re our squirrel adventure. We have caught about 8 - 9 in the trap I linked to but I discovered a more entertaining way to address the problem. When ever I would shoot them with my 4-10 I might get one but then they would sound the alarm and they would all hide for a long time. . . it seems once they saw me it was over as far as getting any good shots. But today I took the screen off the bathroom window - a window that looks out into the small orchard. Well, within an hour I shot 14 of them. It seems they don't see me at all, or well enough, and even after I shoot one, more will be scampering in the orchard within minutes. And overall, not a bad way to entertain myself. 14 is only a small dent in the population, and only for those harvesting our orchard (there are others in other areas around the place) but 14 is better than zero.