Formerly considered to be a wren babbler (with the name Spotted Wren Babbler) but DNA molecular analysis has revealed that it is a unique species, unrelated to wren babblers and is best placed in its own family, the Elachuridae.
Alström, Per; Hooper, Daniel M.; Liu, Yang; Olsson, Urban; Mohan, Dhananjai; Gelang, Magnus; Manh, Hung Le; Zhao, Jian; Lei, Fumin; Price, Trevor D. (2014) Discovery of a relict lineage and monotypic family of passerine birds. Biol. Lett. 10 (3)