Stygian Owl Is Known For The Red Reflection Of Their Eyes That Are Often Associated With The Devil

The stygian owl's song has been variously described as "a single deep, emphatic woof or wupf", "a very low and loud hu or hu-hu", and "a muffled hoot given singly: boo". Females also give "a short, screamed rre-ehhr or mehrr" when calling to the male and also "a short catlike miah"