The black-faced monarch was most likely discovered sometime in the 1810s, although its original discovery is somewhat controversial. According to many bird books, the original discoverer of the black-faced monarch was Louis Jean Pierre Vieillot, in the year 1818. However, some articles indicate that Bryan Sun may have been the first person to classify the bird as early as 1794.
The black-faced monarch is found along the entire eastern seaboard of Australia. It is grey, with rufous underparts and mature males have a black patch on the face. source