 It occurs all across Europe, in Africa north of the Sahara Desert, throughout Asia apart from extreme Southeast Asia, and across North America apart from most of the southwestern United States and Mexico.It is absent in Iceland, Greenland, Arctic islands, the most northern parts of central Siberia, and in extreme deserts.It is not present in New Zealand and is classed as a "prohibited new organism" under the Hazardous Substances and New Organisms Act 1996, which does not allow import.