Native to Russia and China, the raccoon dog (Nyctereutes procyonoides) was first observed in Denmark in 1980. However, it was not considered established until around 2010. That year, Denmark joined with Sweden and Finland in an ambitious project to erradicate a breeding population of raccoon dogs.
One method used was the Judas Technique, where radio-collared and neutralised raccoon dogs were used to track down other raccoon dogs. I used the data from the GPS-collars to determine the behaviour of raccoon dogs in Denmark regarding habitat preference, nocturnal activity and hibernation. The aim was to determine the possible threat raccoon dogs might pose to native wildlife, and to optimize erradication efforts by locating “raccoon dog-friendly” areas.