Abstract
Home-range sizes of adult rock squirrels ( Spermophilus variegatus ) were studied in southeastern Arizona. Twenty-eight adult rock squirrels were radiocollared for various periods from 28 May 1986 to 7 November 1986 and from 15 May 1987 to 19 June 1987. Home-range size was determined by the 95% minimum-convex-polygon method. Data were analyzed monthly and according to reproductive condition. Ranges of adult males were largest during the breeding season (May and June) and generally decreased in size during the remainder of the year. Home-range size of adult females did not vary significantly according to month when all individuals were considered. Also, there was considerable intra- and intersexual overlap of home ranges.
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