The incubation and brooding behavior of Blackbirds (Turdus merula)was observed with focal animal sampling and all occurrence recording methods in Ji'an,Jiangxi Province in two periods: from March to July 2009,and from March to June 2010.The results showed that the female was responsible for incubating.Blackbirds appeared a phenomenon of egg loss and had the egg supplement behavior in the incubation duration.The nest-sitting behavior among earlier stage and later stage of the incubation duration was discrepant,and which had an increasing trend with the increasing of incubation size respectively.Both parents brooding.Three feeding models were observed; female feeding,male feeding and female feeding with the food male brought.Although the feeding frequency increased and the warming reduced along with the growth of nestlings,warming behavior was not observed in the later stage of nestling duration.Blackbird adopted the longer time but less frequency nest-sitting strategy in the incubation duration and the shorter time but more frequency in the earlier stage of nestling duration,in order to get a trade-off about the distribution of the energy in nest-sitting in these two periods.