This paper reports the population dynamics,activities and biomass production of breed-ing population of chinese pond heron from April to September in both 1990 and 1991 at theDongbaowu forest farm in Zhejiang province,China. The population activitles of chinese pondheron may involve 5 phases:homing phase,oestrus phase ,propagation phase,clutch activityphase,schooling and emigration phase. The breeding density of chinese pond heron was 1300ind./hm￣2(1990)or 1401 ind./hm￣2(1991 ) before breeding,and increased ...