First porcupine I ever seen was up in Canada also. Passing thru the Riding Mountain national park in Manitoba and it crossed the road in front of us. Buddy yell's stop the truck and took off after it thru the bush. Like you said it was B&C class size, I bet it would have hit the scales at 25 pounds. It was a bright yellow in color not the normal grey black ones we ran across in Michigan later on. When buddy gave up trying to catch it we ask him what the heck was he going to do with it if he did. He said fishing floats out of the quills. The first one I seen in Michigan was up in a pine tree eating bark. One of the guys had set up a bait under that tree and was wondering what had chewed off all the bark off several limbs. Guess he found out the next morning he climbed into that stand and it was above him and climbed down past him. He took down that stand around noon that day. Old Porky was back up there later in the day eating away.