Habitat management is essential for the conservation of wildlife, especially cranes. Here, we colected occurrence data at wintering grounds for four cranes (Leucogeranus leucogeranus,Grus monacha,Antigone vipio andG.grus) and analyzed associated environmental variables to model and project overal potential wintering habitat using Maxent. ENMTools was used to calculate the degree of niche overlap among cranes. Results showed that lakes in the middle and lower reaches of the Yangtze River are main habitats for the four focal species. Inland water and coastal wetlands in Jiangsu are also potential wintering areas.G. grus spreads over central and eastern China. The four cranes show tight niche overlap in the middle and lower reaches of the Yangtze River. Poyang Lake is one of the most important habitat sites for al four cranes, according to modeling and niche overlap results. Po-yang Lake is cut into a dozen nature reserves, but a bigger nature reserve or system would be more effective for cranes. The conservation of these four crane species wil be improved on the basis of this study.%栖息地管理是野生动物保护的关键，特别是针对鹤类。在这项研究中，我们收集了四种鹤类（白鹤、白头鹤、白枕鹤和灰鹤）越冬地的分布点，以及它们与环境变量的关系，从而通过Maxent建立鹤类潜在越冬栖息地的模型。ENMTools被用来计算鹤类之间生态位重叠的程度。结果显示长江中下游的湖泊湿地是四种鹤类主要的栖息地；江苏的内陆和沿海湿地也是鹤类潜在的越冬分布区；灰鹤的适宜分布区扩散到中国中部和东部。四种鹤类在长江中下游地区具有很高的生态位重叠度。从预测模型和生态位重叠的结果得出，鄱阳湖是四种鹤类最重要的一个潜在分布区。目前鄱阳湖被分割成十几个保护区，但是研究结果表明更大面积的保护区和完整的保护体系要比现在的保护效果更有效。更多的四种鹤类保护可以基于本研究得到改进。
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