We have many wild blackberrys, and a bunch of rasberrys that are either wild or spread from a long-ago resident in the area (story goes that the hermit/mountain man that owned this side of the mountain had a brother living with him who was an amateur horticulturist. There are evergreens around where his cabin stood that are not native to the area. All bushes seemed full and near ripe one day, stripped bare the next. I suspect lot's of critters with belly aches.
Devious, we have huckleberrys up in the mountains. 1/3 the size of blueberrys and 3X the flavor! Problem is, there are natives that love them, too. And right about the time the berrys ripen, those natives are very hungry! One person picks while the other stands lookout.