I believe it was flar who told me two years ago about mulberry trees. I mentioned that I had two berry trees suddenly show up two years ago and that they were rapidly growing. They are well over 20 feet tall now and touching other trees. Going to lop off half of them come fall time. But, in the meantime, will eat some berries and maybe even make a jam or something like flar would. Not that I know how to do that or will even feel like taking the time to do it, but it's a nice thought. Would feel like a waste to not do anything with them.
The taller tree has way more berries and they are ripening. The other, as you can see, still has white berries, and not that many so far.