i have this blackberry type plant growing in my yard, but it isn't a bush!! its a very large tree that bares things that resemble blackberrys but i'm not sure. This tree has been here a while, so it could have grown form a bush but i ghighly doubt it. Could these even be birdberries or something???

Could you have a mulberry tree in your yard?

um...actaully, i wouldn't be suprised (at all) if these WERE mulberry trees. thanks for the response and the idea!!