Stained glass of the Cure of Ethelreda by the blood of Saint Thomas, Canterbury Cathedral, UNESCO World Heritage Site, Canterbury, Kent, England, United Kingdom, Europe

A blood stained knife in a police evidence bag, United Kingdom, Europe

Blood stained knife in a police evidence bag, United Kingdom, Europe

Lion (Panthera leo) female blood-smeared, eating a killed african buffalo (Syncerus caffer) in the bush, Tsavo East National Park, Kenya, East Africa, Africa

Lion (Panthera leo) female blood-smeared, eating a killed african buffalo (Syncerus caffer) in the bush, Tsavo East National Park, Kenya, East Africa, Africa

Lion (Panthera leo) female blood-smeared, eating a killed african buffalo (Syncerus caffer) in the bush, Tsavo East National Park, Kenya, East Africa, Africa

Close-up of cheetah (Acinonyx jubatus) turning blood-stained head right, Klein's Camp, Serengeti National Park; Tanzania

Close-up of male lion (Panthera leo) showing bloody teeth, Serengeti National Park, Tanzania