It did not take long for the phone to ring and, as intended, he ended up with a very black ear. (totalpolitics.com)
Over time, most cats with ear mites develop a characteristic dry black ear discharge that resembles coffee grounds. (animalsheltering.org)
Please contact us right away if your ferret develops any unusual symptoms, such as vomiting, diarrhea, hair loss, lack of appetite, trouble breathing, black ear wax, discharge from the eyes or nose, lumps, swelling, or an increase in aggression or sexual behaviour (especially in neutered males). (glenerinanimalhospital.com)