Three wild foxes were trapped, inoculated with rabid fox salivary glands virus and radio-tracked straightaway for about three weeks until the death of the animal. Comparison of movements between incubation and clinical period indicate principally no obvious alteration of the activity area; an important increase in movement, especially during the day-time and lastly some variable changes in the activity pattern according to the individual. A common characteristic was a long period of immobility, before death, near the border of the usual activity area. In connection with these remarks, many sub-cutaneous lesions were observed from bites on the body of one of these three foxes, after necropsy. Epidemiological consequences of these first results were argued, especially as far as transmission of rabies from one fox to another is concerned.