The behaviour of California ground squirrels

Abstract This report describes the general behaviour patterns, spacing patterns and alarm vocalizations of California ground squirrels ( Spermophilus beecheyi ) as observed in three successive springs of research. Functions are suggested for most behaviour patterns. Males maintain home ranges relatively exclusive of other males via site-specific aggression. Female home ranges overlap extensively with those of other females, and defence is confined to the immediate vicinity of the burrow. Both sexes respond to avian and mammalian predators with relatively predator-specific vocalizations.

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