郑州城区鸦科Corvidae混群鸟冬季大集群栖宿与环境

Roost and environment of mixed-species colony of Corvidae in winter in urban areas of Zhengzhou

鸦科Corvidae混群鸟大嘴乌鸦Corvusmacrorhynchus、秃鼻乌鸦C.frugilegus、白颈鸦C.torquatus、寒鸦C.monedula、达乌里寒鸦C.moneduladauuricus先后于郑州城区冬季大集群栖宿,大集群种类与数量逐年增加,多达10520只余.6年(1998.11～2004.1)6次往返(每年11月来,翌年3月去)季节性迁徙,3次迁移冬季大集群栖宿地,2004.1.29,鞭炮噪声催促,被迫远飞漂游,显示了鸦科混群鸟冬季栖宿大集群、大领域、高警觉、善荡游特征及其对绿色环境、声环境等的选择与适应的复杂行为.

Mixed species colony of Corvidae, including Corvus macrorhynchus, C. frugilegus, C. torquatus, C.monedula and C. monedula dauuricus, has roosted urban areas of Zhengzhou in winters successively. The species and population of colony have been increasing year after year. The population of the colony has reached 10 000.The colony has migrated each year winter from November 1998 to January 2004 （reaching Zhengzhou in November each year and leaving Zhengzhou in March next year） and moved habitat 3 times in 6 year. The colony of Corvidae was frighten away by the noise of crackers at 29 January ,2004. All these show that the same genus colony of Corvidae has the features of wide habitat, high alertness and with the complex behavior to adapt the green environment and voice environment etc.