Natteravnene (English: the Night Ravens), established in 1990, is a Norwegian based franchise organisation of volunteers that encourages adult, sober citizens to walk around in the city in groups at night during the weekends. Their task is to be visible and available for the public as it is believed that this will prevent violence and anti-social behavior. The volunteers will also assist people who are unable to take care of themselves.
The franchise is inspired by the 1985 established Nattugglorna from Karlstad in Sweden, when it was locally recognized in Norway that certain parts of Oslo downtown had become too unsafe for people in general during nighttime. The franchise has since spawned into other parts of Norway as well as having chapters in Denmark, Faroe Islands, Greenland and Sweden (now under the name Nattevandring.NU).