Every summer, the poison ivy seems to explode and so do the myths surrounding this plant. One of the most common is to incorrectly identify Virginia Creeper as poison ivy. It is often found in the same places but it looks totally different (five leaflets): (The other vine behind it is English Ivy.)
and this is Poison Ivy (three leaflets):
The plant with the biggest leaves in this picture is Poison Ivy. This is a very mature plant, hence the size of the leaves. The plant to the left with five leaflets is Virginia Creeper. The small vine is Vinca (Periwinkle) Minor.