I think they are a vine with chartreuse leaves that is growing in the edge of the woods.

Looks like it has flower buds. Doesn't look like it's a climbing plant. Otherwise closer views need to be shown.

It could be a weedy Euonymus of some kind.

Euonymus was my thought too.

I think that is it--wintercreeper grows up stuff so that may be the plant. Getting put on the burn pile, now that I know what it is and where it came from. The neighbors have privet, illeagnus, wisteria, poison ivy, honeysuckle,virginia creeper, and this growing in the hedgerow. It is a constant battle to keep it out of my yard. The birds eat the fruits and then deposit the seeds in my yard--except the wisteria which flings its seeds everywhere in the fall and sends out long distant underground runners that pop up and grow many yards away from their momma.