White believes his figures are accurate because most groups of urban foxes have clearly defined territories marked out by well - lit roads, walls or fences, making it easy for the trackers to see them crossing between territories. (newscientist.com)
In fact, there is far more published data on urban foxes in the UK than on foxes anywhere else in the world. (newscientist.com)
[19] Lubaina Himid, ed., The Thin Black Line (Hebden Bridge: Urban Fox Press, 1985), exhibition catalogue. (spsl-studio.com)