Each of the three monotypic groups is recognized as a species, based on differences in plumage and on morphometrics (Schodde and Mason 1999). The group Crested Shrike-tit (Eastern) Falcunculus frontatus frontatus becomes Eastern Shrike-tit Falcunculus frontatus; the group Crested Shrike-tit (Western) Falcunculus frontatus leucogaster becomes Western Shrike-tit Falcunculus leucogaster; and the group Crested Shrike-tit (Northern) Falcunculus frontatus whitei becomes Northern Shrike-tit Falcunculus whitei.

Reference:

Schodde, R., and I.J. Mason. 1999. The directory of Australian birds. Passerines. CSIRO Publishing, Canberra.