Abstract: Understanding interspecific coexistence by dividing resources has always been a hot issue in the research field of biodiversity. This study aimed to examine the spatial and temporal relationship between Lady Amherst’s pheasant and Temminck’s tragopan in the Yaoshan National Nature Reserve of Yunnan Province. From March 2017 to December 2018, a total of 45 infrared cameras were deployed in the reserve, with a total of 116 independent, effective photos ofLady Amherst’s pheasant and 147 of Temminck’s tragopan being recorded. The analysis of diurnal activity patterns showed that the activity time of Lady Amherst’s pheasant was from 06:00 to 20:00, and the activity peak was from 08:00-10:00 and 17:00-19:00, with the highest peak at 09:00 and 18:00, respectively. The activity time of Temminck’s tragopan was from 05:00-21:00, and the activity peak was from 07:00-09:00 and 17:00-19:00, with the highest peak at 08:00 and 18:00 respectively. Both species were diurnal, without interspecific difference in the diurnal activity patterns (P>0.05). The activity frequency of those two species was different in different seasons. Lady Amherst’s pheasant was the most active in May and October, followed by March and April, while Temminck’s tragopan was most active in May, August and October. The interspecific competition between those two species was reduced by lowering the spatial niche overlap. The interspecific correlation was not strong. This spatial differentiation was conducive to their coexistence.

Key words: Lady Amherst’s pheasant, Temminck’s tragopan, activity rhythm, interspecific association.