The behavioral activity of Oriental white stork at different stages of breeding season had definite rhythm, and the diurnalrhythm differed obviously.
东方白鹳在繁殖期不同阶段行为活动存在一定节律，并且不同阶段日节律明显不同。
2
While there are some individual differences in the circadian rhythm, where some individuals are more nocturnal than others, humans are basically a diurnal (day-living) species.