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The genus Leioptila includes a single species of passerine birds in the family Leiothrichidae.

Leioptila leio From Ancient Greek λεῖος (leîos, “smooth”). ptila/ptilo feather.

1/ Rufous-backed sibia (Khướu lùn lưng hung, Leioptila annectens)
formerly placed in the genus Heterophasia or Minla.

Rufous-Backed Sibia 
(Khướu lùn lưng hung, Mi lưng nâu, Leioptila annectens)

The rufous-backed sibia (Leioptila annectens) is a passerine bird in the family Leiothrichidae.

Leioptila: leio From Ancient Greek λεῖος (leîos, “smooth”); ptila/ptilo feather.
annectens: from the Latin words ad- (an- variant of ad- before n), "towards"; nectens, "tying" or "connecting".