A singulating system for parcels comprises: an inner wall; a first section comprised of a series of driven rollers, which are skewed relative to a longitudinal direction of travel, so that the parcels are conveyed not only in the longitudinal direction of travel, but also toward the inner wall; a second section for receiving the parcels from the first section, and then identifying and moving parcels in a side-by-side arrangement and/or parcels with an irregular shape; and a third section for receiving the parcels from the second section. In some embodiments, the singulating system also includes a visioning subsystem, including a camera for acquiring image data of the parcels as the parcels move toward or into the second section, and a computer to receive and analyze the image data from the camera to identify parcels in a side-by-side arrangement and/or parcels with an irregular shape.