Subspecies
Batrachostomus pygmaeus described as new to science by Alviola (1997) but this treatment has not been adopted by the BirdLife Taxonomic Working Group, which follows Holyoak (1999) and Dickinson (2003) in regarding pygmaeus as an example of Horsfield's Frogmouth (Batrachostomus javensis).
Considered by some authors to be a subspecies of Horsfield's Frogmouth (Batrachostomus javensis).