Table 1.

Environmental information used to characterize the CanL locations in southern France

Information	Variable (unit)	Data source (spatial resolution, date)
Altitude	Altitude (m)	Institut Géographique National (IGN) BDALTI database (250 m)
Temperature	Winter minimum temperature (°C): average of the normal minimum temperatures of January, February and March Summer maximum temperature (°C): average of the normal maximal temperatures of July, August and September Annual mean temperature (°C): annual average of the normal temperature	Météo France (Interpolation from values of normal of temperatures and precipitation of Météo France stations between 1971 and 2000. The method of interpolation is the method of the exponential ordinary kriging for the continent; the method is the inverse distance weighted for Corsica. They show the most suitable results compared with a set of map from Météo France)
Precipitation	Summer rainfall (mm): sum of rainfall of July, August and September Winter rainfall (mm): sum of rainfall of January, February and March Annual total rainfall (mm)
Forest	Presence of three types of forest (Broadleaf forest, coniferous forest, mixed forest)	CORINE Land Cover (100 m, 2006)
Human density	Density per locality (number of residents divided by the surface of the locality)	IGN and Institut national de la statistique et des études économiques (INSEE) (locality, 2006)
Canine density	Density per locality (estimated number of dogs divided by the surface of the locality)	EDEN project http://edendatasite.com (0.008333°, 2005)