1st plant: you look to be right on with Rosa multiflora in full fruit. Please destroy at your earliest convenience.

2nd plant: again, good ID of Cornus racemosa with the white fruit and fine reddish pedicels, though there are so many shrubby dogwoods with very fine gradations of differences in the hairiness of their various leaf surfaces. I think gray dogwood is close enough.

3rd plant: yet another pest plant. I think you've got a buckthorn (Rhamnus sp.) there, esp. the fruit shot with the stiff sharp twigs. I can't make out much from the pic of the full plant, except for the bark at the base of the trunk looks very "cherry" like, which is typical for the invasive Rhamnus species like R. cathartica and R. frangula. This is another plant to eliminate at every opportunity in favor of quality native plants.

Your love for native birds will be amply rewarded by providing them more of what they "grew up with".

Yes, It might be buckthorn. Hard to tell without a closup shot of the leaves. It's definitely one of the three Rhamnus species.