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The length of the oestrous cycle in captive Peradorcas concinna was 33.73 � 1.65 days (n = 52).
Females which were dominant over other females or were alone with their young had a cycle length of
about 32 days and subordinate females had a cycle length of about 35 days. Some observations on the
growth of the young are presented. Weaning is very abrupt; final pouch exit occurs about 2 weeks after
the first pouch exit, and is caused by the female's aggressiveness towards its young.

During oestrus, two captive and isolated female Peradorcas concinna increased their grooming behaviour,
especially of the pouch-urogenital area, but the frequency of other behaviours did not change. In encounters,
females were very aggressive to other females, males and young during their oestrus, and even killed
other adults. Fighting in Peradorcas is unique among macropodids in that it may involve kicking to the
lower back while jumping over another animal, as well as attacks from the rear which involve severe
biting to the back and neck. The vocalizations associated with these interactions are described.