Abstract
I describe prolonged retention of offspring in natal home ranges, or natal philopatry, in the bannertailed kangaroo rat Dipodomys spectabilis. Though weaning occurs at about one month of age, offspring shared natal burrows with their mothers for three to seven months, and 39% of surviving offspring remained within natal home ranges through reproductive maturity. Males as well as females were philopatric. Data on the availability of burrows and on patterns of resettlement suggest that natal philopatry in this species may be a means of providing juveniles with access to essential resources, in this case food caches and large complex burrow systems, that are not readily available outside natal home ranges.
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