The paper reports the results obtained over a period of 19 months (June 1992 to December 1993) from the study of the mounting behaviour of a pair of crested porcupines kept in semicaptivity under red light illumination. Forty-two mounting episodes which occurred inside the artificial burrow were recorded by a videocamera and subsequently analysed to describe the sequence of the mounting and copulation behaviour. The crested porcupine has a rather articulate courtship pattern. In this species, as in the Indian crested porcupine, mounting and copulation occurs throughout the year and appears to be independent of the reproductive status.
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