Abstract: Aegithalos concinnus of Breeding ecology was studied in Zipeng Mountains in Hefei,Anhui Province from April to July,1996 and in March and May,2001.Based on the fieldwork,characteristics of the chicks were studied. A.concinnus was ruttish in the middle ten days of March and nested in the last ten day of the month.The nests were spherical among leaves under branches of firs with lateral or top lateral opening.Eggs were laid in early April.Clutch was 6 25.Incubation lasts 15～16 days,and 88% of the eggs had chicks.Parent birds cared their young for 15～16 days with all of 22 young birds leaving their nests.The growth curves of their body mass,wing,rostra,tarsus,remix and tail were suitable to fit to Logistic equations.Of the fitting parameters,inflection of the curves of rostra was least,and the growth rates of remix,wing and tail were higher. These implied that feeding configurations developed early,howore the configurations related to flight grew quicker in late middle nestling period.

Key words: Artificial mangroves, Sonneratia apetala, Sonneratia caseolaris, Kandelia candel, Community dynamics, Species-diversities