Abstract: The breeding period of Azure-winged magpie has a delay with increasing latitude from south to north, and the position of its nests are higher from the ground and more cryptic with increasing population density. This kind of strong adaptive ability to environment make them survival and reproduction well in city and its suburbs. Azure-winged magpie in Beijing district begins to nest in the middle or late April, and reaches the top of laying-eggs period in the late May. Azure-winged magpie always turns over its eggs during incubation. When exchanging its eggs with quail's ones, it's found that Azure-winged magpie is much sensitive to egg's number than its size and color. The incubation period is 15-17 days, and the fledgelings leave their nest in 18-20 days after hatching. The successful rate of breeding in the campus of Peking University is about 69.05%. Adevelopmental ethogram of Azure-winged magpie is set up there. Their nests are dense and form a collective breeding territory. They are cooperative efforts in defence of a breeding territory.

Key words: Behavioural adaptation, Successful rate of breeding, Developmental ethogram, Breeding territory, Cooperative defence, SPOT5., object-based method, forest inventory parameter, decision tree, aboveground carbon storage