Intra- and inter-familial behaviour of Glaucomys volans (Rodentia) following parturition

Abstract

Experimental analysis and observational data on retrieving behaviour in female flying squirrels, Glaucomys volans, indicate that the retrieving drive is very strong, that females prior to 40 days post partum do not distinguish between their own young and those of other females (provided the babies are less than 40 days old), and that extra-familial young are usually attacked after 40 days post partum. Younger babies were retrieved by females more frequently than older ones (when the age difference was 18 to 19 days), regardless of whether they were intra- or extra-familial. Experimental evidence. although limited, suggests that odour is important in the female's ability to distinguish (1) between her own and extra-familial young over 40 days old, and (2) extra-familial young of any age after 40 days post partum. Females that had litters during the annual intensive food storing period retrieved nuts, when these were presented in lieu of babies, and placed them in their nests. Females sometimes `stored' their babies when these were presented after a sequence of nut retrieving.