人造园林中斑文鸟和白腰文鸟的巢址选择

Nest-site selection is important to ensure the success of bird survival and reproduction and to reduce the predation rate and interspecific competition. During 2016 to 2017, a survey for the sympatric scaly-breasted munia (Lonchura punctulata) and white-rumped munia (L. striata) was carried out in 3 study areas of an artificial botanical garden in Xishuangbanna, southwest China. Of the 15 recorded variables of nest-site characters, 14 numeric variables were applied to the logistic regression model to find out the key factors that influencing the nest-site selection of the 2 munias. The independent samplet-test and Mann-WhitneyU-test were used to test the significance between their nest-site character selections, and the Permutation test was used to test the significance in their preferences of nest-tree species. It was found that the nest distribution patterns of the 2 munias varied differently among the 3 study areas. The distance to the nearest nest of different bird species, the diameter at breast height of the nest-tree, the distance to water source of the nest-tree and the nest height above ground were the key factors affecting their nest-site selection. Compared withL. striata,L. punctulatapreferred building the nest higher in the tree with thinner breast diameter, further away from the nest of different species and closer to the water source.L. punctulatapreferred interwoven trees, whileL. striatapreferred thorny ones, which may be their different defensive strategies against predators.