Poison Ivy

Poison ivy is a native vine.  The oil from bruised leaves causes a rash on the skin.  On exposure, wash immediately, preferably with an oil-cutting dish soap like Dawn. Birds eat the berries in the late fall and winter.  The fall color is a beautiful orange.  The plant can be a low ground cover, a below height bushy shrub, a waist high bushy shrub, or a vine.  It often appears along paths as a spindly tall shrub because it has been brushed into and worn back.

You will have to chose whether to patrol for and remove it as part of your maintenance or leave it where it grows naturally and avoid touching it.