This species is known only from an individual trapped in 1988 and the species was described using blood and feather samples to provide a DNA specimen.
Unlike the usual practice, the bird was not killed as a type; it was released back into the wild in 1990 because the scientists researching it felt that the species was very rare.
The species name of liberatus (“the liberated one”) was given due to this fact.
It is critically endangered and it was not found during searches in 1989 and 1990.
The Bulo Burti BoubouIt resembles the Red-naped Bush-shrike L. ruficeps but has no red nape (back of the neck), is black, not grey, on the mantle, and is washed buffy-yellow on throat and breast.