The first few species are placed on the landscape at random.

Many species currently assigned to this group have been placed in other groups at different times.

This species has been placed in several bird families since its description.

These species are placed within 1,260 genera and 106 families.

Before 2002, this species was placed within the family Thiaridae.

This species is instead sometimes placed in the family Gymnodorididae.

Many species of Tarache were also once placed here (see below).

The assessed species are placed in categories according to the risk they represent.

However, it is not certain whether several of the species usually placed in this genus indeed belong here.

Three other species, formerly placed here, are now in Colaptes.