What kind of mulberries? Red or white? One is invasive, one is an endangered native. What kind of maple? If you continue, look for helicopters, and see if white goo comes out when you break a leaf.

they wont fall in 10 years.. maybe 30 ... think in tree time ...

you need to do a full inventory ... and decide which trees will stay.. and which should go ...

these are tall and spindly from growing in too much shade ... so.. if your leaving the bigger trees.. get rid of these ...

should you decide any of the others are carp.. then maybe some of these should stay ...

having a billion too many mulberry saplings in my yard.. i suggest you get rid of such .... odds are high.. your self sown tree is the bird dropped invasive one ...

ken

Ok, I got up close and it turns out they aren't mulberries at all. The two on the left are locusts, and the one on the right is something else, here are the leaves:

Apple, of some sort...

Last is apple like bill says, or maybe serviceberry?

No, its an Apple.

lets see how the apple develops ... and then decide whether to keep or get rid of ...

if you want to grow fruit.. imo ... buy a quality cultivar ... bird planted fruit is usually not a quality eating fruit .. and a non producing fruit tree can be a dirty nuisance tree ... as in disease ridden [which many fruit trees are without the repeated sprays orchards use].. then the falling fruit rotting and fermenting in fall.. inviting all the wasps and bees to come along and get stoned ...

also.. with the loss of the large trees.. the whole dynamic of sunlight has changed back there.. so observation fo rthe season is not a bad idea ...

ken

As the season has gone on, I noticed those two trees circled on the left in the original photo aren't black locusts, they are black walnuts. I can see a nut on the left one, and I have at least 2 larger black walnuts trees also bearing nuts on the property. I noticed the branches with nuts on them around the yard for the first time this year. The big tree to the right of them is a pin oak. Will the juglone hurt the pin oak, and the silver maple to the left? I'll try to get a picture of the leaves tomorrow when the sun is out.

Doubt if juglone will hurt an oak, but it prb'ly will hurt silver maple.

That depends on whether you want woods in that spot, or just a few shade trees in lawn. As others have said, young trees will not be dying a natural death for 30 years. If you plant, or Mother Nature plants, trees that require a lot of water, then your trees are unlikely to die an early death. Apples are good for wet areas; they thrive on moisture, as do willows, hemlocks, and others, but a benefit to apples and related trees is their relatively small size, since you are looking ahead to a day when they may need to be removed in their old age. It's a lot easier, safer, and less expensive to remove an ancient apple tree or cherry tree than a massive oak tree.

Mulberry? You'll likely have 50 of them in 10 years. Black locust? You wouldn't want to prune that. I say remove them. They're weed trees.

If they are black walnut I'd keep them. They are a threat to silver maple but not other kinds of maple or most oak.

"they are a threat to silver maple"

Sounds good to me. Nobody should want seedlings from such weedy trees.