There's this tree that seems to be spreading along the wood line at a industrial complex area I visit. It looked interesting so I had grabbed a couple small plant's that were sprouting up. The largest of the group was about 30ft tall but most were shorter and more leaning towards the area where the sun shown best.
It's December with temperatures having already dipped below freezing around 4 or 5 times, but the leaves are still vibrant and with no signs of it wilting at all.
I'm hesitant to plant these around my house in case they are poisonous or invasive. There seems to be a lot of bird nest's around them, so I had thought the berries were attracting them. After coming home I decided to see what was inside some of the berries I gathered. They are 1/2 inch in size, with a large seed that takes up the entire center surrounded by the skin. I'm unsure if the birds were actually eating these now since they are so large.
Anyone with knowledge on what this may be? Only thing I can come up with after searching for hours is a thornless Cockspur Hawthorn but I'm not too sure about that. I first thought Chokeberry or Service Berry tree, but the berries on this tree have nothing there but the seed inside.
The tallest of the tree's i this picture surround by others, most likely it's offspring.