Blackberries and blueberries

We're getting a bumper crop of blackberries and blueberries this year in West Concord.
For the past month, they've been going gangbusters, literally hundreds of blueberries and many blackberries. Not enough to make a blueberry pie or anything, but more than enough to make pretty good pancakes. Interestingly, or maybe not so, they were just pricker bushes last year. There weren't many raspberries at all this year, only two.
Another interesting thing is how the bushes have traveled from one side of the yard to the other. Historically, the blackberries and raspberries were on the west side of the yard. Granted, this was back 25 years ago or so. They were cleared out a while ago. Now, they are on the south side, with the blueberries moving east to south too.