Unexpected orchard

So, on closer examination, just about every tree in the backyard is some fruit-bearing variety. I went 'round and looked at them all yesterday evening, and this is what I think we've got:

Apricot (nearly ripe enough to pick and eat), apple, mystery fruit that looks kind of like a small green apple, mystery citrus (probably orange or lime), grapefruit, pear, persimmon, and lemon.

I'm going to need to learn how to prune fruit trees properly, though.