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Habitat use and diet of wolves Canis lupus were examined in a mountainous area in the northern Apennines (northern Italy) from December 1987 to March 1989. Wolf signs were looked for along 22 transects representative of the different habitat types of the study area in order to define seasonal differences in habitat use. Scats were collected and analysed to identify the main food items used by wolves in each season. Changes in range surface area were recorded in different seasons in relation to food availability and territoriality of the wolves.