By deploying 50 infrared cameras,the Muntiacus nigripes in the Wuzhishan Area of the Hainan Tropical Rainforest National Park were monitored for five years from March 2015 to February 2020,and a com-prehensive analysis was conducted based on the collected photos.The activity rhythm of M.nigripes was ana-lyzed by using three different factors:daily-discrepancy index(DDI),diurnal-nocturnal index(DNI),and sea-sonal-activity index(SAI).Meanwhile,the overlap of activity rhythms between M.nigripes and Sus scrofa in the same area was determined through kernel density estimation.The results are as follows:(1)There was no significant difference in the DDIs between each month(t=0.001,df=11,P＞0.05).During the day,the most active periods of M.nigripes concentrated 6:00～10:00 and 16:00～18:00,in which the peak appeared at 7:00 and 17:00,showing a typical bimodal pattern.(2)There was no significant difference in the DNIs between each month(t=0.610,df=11,P＞0.05).The average DNI was 0.68,bigger than 0.54(13/24),which showed that the M.nigripes in the Wuzhishan Area were diurnal.(3)There were significant differences in SAIs between dif-ferent season categories(χ2=12.028,df=3,P=0.007,P＜0.05).(4)The overlap coefficient of activity rhythm between M.nigripes and S.scrofa was 0.82,and the difference between their daily activity rhythm curves was significant(△4=0.82,P=0.002,P＜0.01),indicating that the activity times of the two species were signifi-cantly differentiated.
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