A mummer's mask was worn during the Black Plague primarily by physicians who cared for the dying. It was shaped like a raven's beak and filled with rose or other flower petals to cover the smell of death.
>>>previous pinner [PERFECT image of a Crow showing all of his distinctive features and differences from a Raven. Also, 'Crows walk n Ravens hop' . NOT exactly true as Ravens DO walk but will do double hops too]